Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl
Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl
(1) gets oxidised by oxalic acid to chlorine
(2) furnishes H+ ions in addition to those from oxalic acid
(3) reduces permanganate to Mn2+
(4) oxidises oxalic acid to carbon dioxide and water
At 80 C, the vapour pressure of pure liquid ‘A’ is 520 mm Hg and that of pure liquid ‘B’ is 1000 mm Hg. If a mixture solution of ‘A’ and ‘B’ boils at 80 C and 1 atm pressure, the amount of ‘A’ in the mixture is (1 atm = 760 mm Hg)
At 80 C, the vapour pressure of pure liquid ‘A’ is 520 mm Hg and that of pure liquid ‘B’ is 1000 mm
Hg. If a mixture solution of ‘A’ and ‘B’ boils at 80 C and 1 atm pressure, the amount of ‘A’ in the mixture is (1 atm = 760 mm Hg)
Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is?
Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is?
For the redox reaction
Zn(s) + cu2+ (0.1 M) --> Zn2+ (1M) + Cu(s)
taking place in a cell, E0cell is 1.10 volt. Ecell for the cell will be:
For the redox reaction
Zn(s) + cu2+ (0.1 M) --> Zn2+ (1M) + Cu(s)
taking place in a cell, E0cell is 1.10 volt. Ecell for the cell will be:
In a 0.2 molal aqueous solution of a weak acid H X, the degree of ionization is 0.3. Taking Kf for water as 1.85, the freezing point of the solution will be nearest to:
In a 0.2 molal aqueous solution of a weak acid H X, the degree of ionization is 0.3. Taking Kf for water as 1.85, the freezing point of the solution will be nearest to:
The rate law for a reaction between the substances A and B is given by rate = k [A]n[B]m. On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as :
The rate law for a reaction between the substances A and B is given by rate = k [A]n[B]m. On doubling the concentration of A and halving the concentration of B, the ratio of the new rate to the earlier rate of the reaction will be as :
25mL of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titer value of 35 mL. The molarity of barium hydroxide solution was :
25mL of a solution of barium hydroxide on titration with 0.1 molar solution of hydrochloric acid gave a titer value of 35 mL. The molarity of barium hydroxide solution was :
The correct relationship between free energy change in a reaction and the corresponding equilibrium constant Kc is :
The correct relationship between free energy change in a reaction and the corresponding equilibrium constant Kc is :
If at 298K the bond energies of C--H, C-C, C = C, and H-H bonds are respectively 414, 347, 615, and 435 kJ mol-1. The value of enthalpy change for the reaction
H2C = CH2(g) + H2(g) -->H3C - CH33(g) at 298K will be:
If at 298K the bond energies of C--H, C-C, C = C, and H-H bonds are respectively 414, 347, 615, and 435 kJ mol-1. The value of enthalpy change for the reaction
H2C = CH2(g) + H2(g) -->H3C - CH33(g) at 298K will be:
The enthalpy change for a reaction does not depend upon the:
The enthalpy change for a reaction does not depend upon the:
A pressure cooker reduces cooking time for food because:
A pressure cooker reduces cooking time for food because:
Which one of the following processes will produce hard water?
Which one of the following processes will produce hard water?
Which one of the following compounds has the smallest bond angle in its molecule?
Which one of the following compounds has the smallest bond angle in its molecule?
Which of the following pairs of molecules will have permanent dipole moments for both members?
Which of the following pairs of molecules will have permanent dipole moments for both members?
Which one of the following groupings represents a collection of isoelectronic species?
(At. numbers : Cs-55, Br-35)
Which one of the following groupings represents a collection of isoelectronic species?
(At. numbers : Cs-55, Br-35)
In the anion HCOO- the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?
In the anion HCOO- the two carbon-oxygen bonds are found to be of equal length. What is the reason for it?
The pair of species having identical shapes for molecules of both species is
The pair of species having identical shapes for molecules of both species is
The atomic numbers of vanadium (V), chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?
The atomic numbers of vanadium (V), chromium (Cr), manganese (Mn) and iron (Fe) are respectively 23, 24, 25 and 26. Which one of these may be expected to have the highest second ionization enthalpy?
Consider the reaction equilibrium
On the basis of Le-Chatelier's principle, the condition favorable for the forward reaction is
Consider the reaction equilibrium
On the basis of Le-Chatelier's principle, the condition favorable for the forward reaction is
What volume of hydrogen gas, at 273K and 1 atm pressure will be consumed in obtaining 21.6g of elemental boron (atomic mass 10.8) from the reduction of boron trichloride by hydrogen?
What volume of hydrogen gas, at 273K and 1 atm pressure will be consumed in obtaining 21.6g of elemental boron (atomic mass 10.8) from the reduction of boron trichloride by hydrogen?
For the reaction equilibrium,
the concentrations of N2O4 and NO2 at equilibrium are 4.8 x 10-2 and 1.2 x 10-2 mol L-1 respectively. The value of Kc for the reaction is:
For the reaction equilibrium,
the concentrations of N2O4 and NO2 at equilibrium are 4.8 x 10-2 and 1.2 x 10-2 mol L-1 respectively. The value of Kc for the reaction is:
The solubility in water of a sparingly soluble salt AB2 is 1.0 x 10-5 mot U1. Its solubility product number will be
The solubility in water of a sparingly soluble salt AB2 is 1.0 x 10-5 mot U1. Its solubility product number will be
When during electrolysis of a solution of AgN03, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be
When during electrolysis of a solution of AgN03, 9650 coulombs of charge pass through the electroplating bath, the mass of silver deposited on the cathode will be
For the redox reaction
Zn(s) + cu2+ (0.1 M) --> Zn2+ (1M) + Cu(s)
taking place in a cell, E0cell is 1.10 volt. Ecell for the cell will be:
For the redox reaction
Zn(s) + cu2+ (0.1 M) --> Zn2+ (1M) + Cu(s)
taking place in a cell, E0cell is 1.10 volt. Ecell for the cell will be:
The pKa of a weak acid, HA, is 4.80. The pKb of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be
The pKa of a weak acid, HA, is 4.80. The pKb of a weak base, BOH, is 4.78. The pH of an aqueous solution of the corresponding salt, BA, will be
In a compound atoms of element Y from ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of the compound will be
In a compound atoms of element Y from ccp lattice and those of element X occupy 2/3rd of tetrahedral voids. The formula of the compound will be
The vapour pressure of water at 20oC is 17.5 mm Hg. If 18 g of glucose (C6H12O6) is added to 178.2 g of water at 20oC, the vapour pressure of the resulting solution will be
The vapour pressure of water at 20oC is 17.5 mm Hg. If 18 g of glucose (C6H12O6) is added to 178.2 g of water at 20oC, the vapour pressure of the resulting solution will be
The ionization enthalpy of hydrogen atom is 1.312 × 106 Jmol−1. The energy required to excite the electron in the atom from n = 1 to n = 2 is?
The ionization enthalpy of hydrogen atom is 1.312 × 106 Jmol−1. The energy required to excite the electron in the atom from n = 1 to n = 2 is?
According to the periodic law of elements, the variation in properties of elements is related to their:
According to the periodic law of elements, the variation in properties of elements is related to their:
Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anamalous behavior is that :
Graphite is a soft solid lubricant extremely difficult to melt. The reason for this anamalous behavior is that :
The IUPAC name of CH3COCH(CH3)2 is
The IUPAC name of CH3COCH(CH3)2 is
When
is reduced with LiAlH4, the compound obtained will be
is reduced with LiAlH4, the compound obtained will be
When is reduced with LiAlH4, the compound obtained will be
According to the kinetic theory of gases in an ideal gas, between two successive collisions a gas molecule travels:
According to the kinetic theory of gases in an ideal gas, between two successive collisions a gas molecule travels:
Which of the following group of transition metals is called coinage metals?
Which of the following group of transition metals is called coinage metals?
The general formula CnH2nO2 could be for open-chain:
The general formula CnH2nO2 could be for open-chain:
Ether is more volatile than alcohol having the same molecular formula. This is due to
Ether is more volatile than alcohol having the same molecular formula. This is due to
Among the following four structures I to IV, which one is true?
Among the following four structures I to IV, which one is true?
Which one of the following processes will produce hard water?
Which one of the following processes will produce hard water?
Which one of the following compounds has the smallest bond angle in its molecule?
Which one of the following compounds has the smallest bond angle in its molecule?
Which of the following pairs of molecules will have permanent dipole moments for both members?
Which of the following pairs of molecules will have permanent dipole moments for both members?
Which one of the following groupings represents a collection of isoelectronic species?
(At. numbers : Cs-55, Br-35)
Which one of the following groupings represents a collection of isoelectronic species?
(At. numbers : Cs-55, Br-35)
Experimentally it was found that a metal oxide has formula M0.98O. Metal M, is present as M2+ and M3+ in its oxide. Fraction of the metal which exists as M3+ would be :
Experimentally it was found that a metal oxide has formula M0.98O. Metal M, is present as M2+ and M3+ in its oxide. Fraction of the metal which exists as M3+ would be :
An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism :
An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism :
Glass is a
Glass is a
Which of the following statement is correct?
Which of the following statement is correct?
Which one of the following bases is not present in DNA?
Which one of the following bases is not present in DNA?
The major organic compound formed by the reaction of 1, 1, 1 − trichloroethane with silver powder is :
The major organic compound formed by the reaction of 1, 1, 1 − trichloroethane with silver powder is :
The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is :
The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is :
Which one is classified as a condensation polymer?
Which one is classified as a condensation polymer?
The most suitable reagent for the conversion of R − CH2 − OH → R − CHO is :
The most suitable reagent for the conversion of R − CH2 − OH → R − CHO is :
Which of the following complex species is not expected to exhibit optical isomerism ?
Which of the following complex species is not expected to exhibit optical isomerism ?
Which one of the following molecules is expected to exhibit diamagnetic behaviour ?
Which one of the following molecules is expected to exhibit diamagnetic behaviour ?
A solution of (−)−1 − chloro − 1− phenylethane in toluene racemises slowly in the presence of a
small amount of SbCl5,due to the formation of :
small amount of SbCl5,due to the formation of :
A solution of (−)−1 − chloro − 1− phenylethane in toluene racemises slowly in the presence of a
small amount of SbCl5,due to the formation of :
A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0° C. As it does so, it absorbs 208 J of heat. The values of q and w for the process will be :
(R = 8.314 J / mol K) (ln 7.5 = 2.01)
(R = 8.314 J / mol K) (ln 7.5 = 2.01)
A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0° C. As it does so, it absorbs 208 J of heat. The values of q and w for the process will be :
(R = 8.314 J / mol K) (ln 7.5 = 2.01)
The molarity of a solution obtained by mixing 750 mL of 0.5(M)HCl with 250 mL of 2(M)HCl will be :
The molarity of a solution obtained by mixing 750 mL of 0.5(M)HCl with 250 mL of 2(M)HCl will be :
A compound with molecular mass 180 is acylated with CH3COCl to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is :
A compound with molecular mass 180 is acylated with CH3COCl to get a compound with molecular mass 390. The number of amino groups present per molecule of the former compound is :
Which of the following exists as covalent crystals in the solid state ?
Which of the following exists as covalent crystals in the solid state ?
Synthesis of each molecule of glucose in photosynthesis involves :
Synthesis of each molecule of glucose in photosynthesis involves :
How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2 ?
How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2 ?
The orbital angular moment for an electron revolving in an orbit is given by 
This momentum for an s-electron will be given by:
This momentum for an s-electron will be given by:
The orbital angular moment for an electron revolving in an orbit is given by This momentum for an s-electron will be given by:
How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g?
[Atomic masses: Na = 23 and cl = 35.5]
How many unit cells are present in a cube-shaped ideal crystal of NaCl of mass 1.00 g?
[Atomic masses: Na = 23 and cl = 35.5]
In Bohr series of lines of the hydrogen spectrum, the third line from the red end corresponds to which one of the following inner orbit jumps of electron for Bohr's orbit in atom of hydrogen?
In Bohr series of lines of the hydrogen spectrum, the third line from the red end corresponds to which one of the following inner orbit jumps of electron for Bohr's orbit in atom of hydrogen?
The de-Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approximately?
[Planck's constant, h = 6.63 x 10-34 Js]
The de-Broglie wavelength of a tennis ball of mass 60 g moving with a velocity of 10 m/s is approximately?
[Planck's constant, h = 6.63 x 10-34 Js]
The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :
The metal that cannot be obtained by electrolysis of an aqueous solution of its salts is :
If Z is a compressibility factor, van der Waals equation at low pressure can be written as
If Z is a compressibility factor, van der Waals equation at low pressure can be written as
Consider separate solutions of 0.500 M C2H5OH(aq), 0.100 M Mg3(PO4)2(aq), 0.250 M KBr(aq) and 0.125 M Na3PO4(aq) at 25°C. Which statement is true about these solutions, assuming all salts to be strong electrolytes ?
Consider separate solutions of 0.500 M C2H5OH(aq), 0.100 M Mg3(PO4)2(aq), 0.250 M KBr(aq) and 0.125 M Na3PO4(aq) at 25°C. Which statement is true about these solutions, assuming all salts to be strong electrolytes ?
Resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution is 1.4 S m−1. The resistance of 0.5 M solution of the same electrolyte is 280 Ω. The molar conductivity of 0.5 M solution of the electrolyte in S m2 mol−1 is :
Resistance of 0.2 M solution of an electrolyte is 50 Ω. The specific conductance of the solution is 1.4 S m−1. The resistance of 0.5 M solution of the same electrolyte is 280 Ω. The molar conductivity of 0.5 M solution of the electrolyte in S m2 mol−1 is :
CsCl crystallises in body centred cubic lattice. If ‘a’ is its edge length then which of the
following expressions is correct ?
following expressions is correct ?
CsCl crystallises in body centred cubic lattice. If ‘a’ is its edge length then which of the
following expressions is correct ?
For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 mL of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is :
For the estimation of nitrogen, 1.4 g of an organic compound was digested by Kjeldahl method and the evolved ammonia was absorbed in 60 mL of M/10 sulphuric acid. The unreacted acid required 20 mL of M/10 sodium hydroxide for complete neutralization. The percentage of nitrogen in the compound is :
For the reaction SO2(g) + 1 O2(g)
For the reaction SO2(g) + 1 O2(g)
On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is
On heating an aliphatic primary amine with chloroform and ethanolic potassium hydroxide, the organic compound formed is
The correct statement for the molecule, CsI3, is :
The correct statement for the molecule, CsI3, is :
Which one of the following bases is not present in DNA?
Which one of the following bases is not present in DNA?
The major organic compound formed by the reaction of 1, 1, 1 − trichloroethane with silver powder is :
The major organic compound formed by the reaction of 1, 1, 1 − trichloroethane with silver powder is :
The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is :
The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1 : 4. The ratio of number of their molecule is :
Which one is classified as a condensation polymer?
Which one is classified as a condensation polymer?
The most suitable reagent for the conversion of R − CH2 − OH → R − CHO is :
The most suitable reagent for the conversion of R − CH2 − OH → R − CHO is :
States of matter
two gases A and B are at same temperature , the molecules of A are travelling 4 times faster than the molecules of B . the ratio of MA/MB of their masses will be
Bond lenght
Calculate the bond length of HCl molecule if its moment of inertia is 2×10–40 gm
cm2 and reduced mass is 1.0 g mol–1.
. Metallic gold crystalises in face centred cubic lattice , Its edge length is 408 pm. What is the radius of gold atom
A is more solluble than B in same solution if it undergoes cystalisation what solution will crystalise faster?
Calculate empirical formula weight from the given values and molecular weight from freezing point depression?
Calculate empirical formula weight from the given values and molecular weight from freezing point depression?
When 30.0 g of a nonvolatile solute having the empirical formula CH20 of water ,the solution freezes it-1.16°C. What is the molecular formula of solute
When 30.0 g of a nonvolatile solute having the empirical formula CH20 of water ,the solution freezes it-1.16°C. What is the molecular formula of solute
An element crystallise in F.C.C whose crystal density 5.2 gm/cm^3 and limiting length is 300 pm.Calculate number of atoms present in 105.65 gm of an element.
An element crystallise in F.C.C whose crystal density 5.2 gm/cm^3 and limiting length is 300 pm.Calculate number of atoms present in 105.65 gm of an element.
Gold Au(197) crystallises in F.C.C whose crystal density is 19.3 gm/cm^3 .Calculate atomic radius of gold atom.
Gold Au(197) crystallises in F.C.C whose crystal density is 19.3 gm/cm^3 .Calculate atomic radius of gold atom.
Li has a bcc structure. its is 530 kg and its atomic mass is 6.94 g/mol . Calculate length of a unit cell of lithium meta
Li has a bcc structure. its 
is 530 kg and its atomic mass is 6.94 g/mol . Calculate length of a unit cell of lithium meta
SMALLEST ELEMENT IN PERIODIC TABLE
Which is the smallest element in the periodic table and why ???
When 20 g of napthanoic acid (C11H8O2) is dissolved in 50 g of benzene (K, = 1.72 K kg/mol) a freezing pointdepression of 2 K is observed. The van't Hoff factor (i) is
When 20 g of napthanoic acid (C11H8O2) is dissolved in 50 g of benzene (K, = 1.72 K kg/mol) a freezing point
depression of 2 K is observed. The van't Hoff factor (i) is
A 0.2 molal aqueous solution of weak acid HX is 20% ionized. The freezing point of solution is(Kf=1.86)
A 0.2 molal aqueous solution of weak acid HX is 20% ionized. The freezing point of solution is(Kf=1.86)
The value of observed and calculated molecular weights of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of silver nitrate is
The value of observed and calculated molecular weights of silver nitrate are 92.64 and 170 respectively. The degree of dissociation of silver nitrate is
If a solute undergoes dimerisation and trimerisation, the minimum values of the van't Hoff factors are
If a solute undergoes dimerisation and trimerisation, the minimum values of the van't Hoff factors are
2 millimolar solution of sodium ferrocyanide is 60% dissociated at 27°C. Osmotic pressure of the solution is
2 millimolar solution of sodium ferrocyanide is 60% dissociated at 27°C. Osmotic pressure of the solution is
A water sample contains 9.5% MgCl2 and 11.7% NaCl (by weight). Assuming 80% ionisation of each salt.Boiling point of water will be approximately (Kb= 0.52)
A water sample contains 9.5% MgCl2 and 11.7% NaCl (by weight). Assuming 80% ionisation of each salt.Boiling point of water will be approximately (Kb= 0.52)
A complex is written as M(en)y.xBr. Its 0.05 molar solution shows 2.46 atm osmotic pressure at 27°C.Assuming 100% ionisation and coordination number of metal (III) is six, complex may be
A complex is written as M(en)y.xBr. Its 0.05 molar solution shows 2.46 atm osmotic pressure at 27°C.Assuming 100% ionisation and coordination number of metal (III) is six, complex may be
20 g of non-electrolyte, non-volatile solute (CxH2xOx), when dissolved in 100 gm water at 100°C, lowers the vapour pressure of solution by 1/100 th of the vapour pressure of pure water at this temperature. What is formula of the compound?
20 g of non-electrolyte, non-volatile solute (CxH2xOx), when dissolved in 100 gm water at 100°C, lowers the vapour pressure of solution by 1/100 th of the vapour pressure of pure water at this temperature. What is formula of the compound?
Degree of dissociation of three binary electrolytes AB, CD and EF are 60%, 20% and 100% in the solution having same mole fraction of water. Ratio of lowering in vapour pressure of their solution is
Degree of dissociation of three binary electrolytes AB, CD and EF are 60%, 20% and 100% in the solution having same mole fraction of water. Ratio of lowering in vapour pressure of their solution is
Osmotic pressure of a blood sample is 4.92 atm at 27°C. Which of the following is not isotonic with bloodsample?
Osmotic pressure of a blood sample is 4.92 atm at 27°C. Which of the following is not isotonic with blood
sample?
0.067 molar aqueous solution of a binary electrolyte A+B– shows 2.46 atm osmotic pressure at 27°C. What fraction of A+B– remains unionised?
0.067 molar aqueous solution of a binary electrolyte A+B– shows 2.46 atm osmotic pressure at 27°C. What fraction of A+B– remains unionised?
Out of X-rays, infrared rays, visible rays and microwaves, the largest frequency is of
Out of X-rays, infrared rays, visible rays and microwaves, the largest frequency is of
How many electrons with / = 2 are there in an atom having atomic number 54?
How many electrons with / = 2 are there in an atom having atomic number 54?
The maximum number of electrons possible in subshell is equal to
The maximum number of electrons possible in subshell is equal to
The potential energy of an electron in hydrogen atom is -3.02 eV, its kinetic energy will be
The potential energy of an electron in hydrogen atom is -3.02 eV, its kinetic energy will be
In the emission line spectra of hydrogen atom, how many lines can be accounted for all possible electronic transitions from 5th energy level within the atom?
In the emission line spectra of hydrogen atom, how many lines can be accounted for all possible electronic transitions from 5th energy level within the atom?
Which set of quantum numbers is not consistent with theory?
Which set of quantum numbers is not consistent with theory?
The total number of electrons in a 4d subshell are
The total number of electrons in a 4d subshell are
The correct set of quantum numbers for the unpaired electron of chlorine atom is
The correct set of quantum numbers for the unpaired electron of chlorine atom is
The electron identified by quantum numbers n and / (i) n=4,/=1 (ii) n=4,/=0, (iii) n= 3,/=0 (v) n=3,/= 1 Can be placed in order of increasing energy
The electron identified by quantum numbers n and /
(i) n=4,/=1 (ii) n=4,/=0, (iii) n= 3,/=0 (v) n=3,/= 1
Can be placed in order of increasing energy
Which of the following represent(s) the correct set of four quantum numbers of a 4d electron?
Which of the following represent(s) the correct set of four quantum numbers of a 4d electron?
How many 3d electrons can have spin quantum number -1/2 ?
How many 3d electrons can have spin quantum number -1/2 ?
The total number of orbitals in a shell with principal quantum number n is
The total number of orbitals in a shell with principal quantum number n is
The momentum of a particle which has a de Broglie wavelength of 0.1 nm is (h = 6.6 × 10^-34 Js)
The momentum of a particle which has a de Broglie wavelength of 0.1 nm is (h = 6.6 × 10^-34 Js)
Which of the following equation was suggested by de Broglie?
Which of the following equation was suggested by de Broglie?
Which of the following has the same number of s-electrons as the d-electrons in Fe2+?
Which of the following has the same number of s-electrons as the d-electrons in Fe2+?
The radius of 5th Bohr orbit in hydrogen atom is
The radius of 5th Bohr orbit in hydrogen atom is
Which of the following ion has the maximum magnetic moment?
Which of the following ion has the maximum magnetic moment?
Which of the following layering pattern will have a void fraction of 0.26?
Which of the following layering pattern will have a void fraction of 0.26?
A binary solid has atoms B constitutes fcc lattice and atoms A occupies 25% of tetrahedral holes. The formula of solid is
A binary solid has atoms B constitutes fcc lattice and atoms A occupies 25% of tetrahedral holes. The formula of solid is
If a cation leaves a site in solid lattice, and is located at an interstitial position. The lattice defect is
If a cation leaves a site in solid lattice, and is located at an interstitial position. The lattice defect is
The ratio of number of closed packed atoms to the number of tetrahedral holes in cubic closed packing is
The ratio of number of closed packed atoms to the number of tetrahedral holes in cubic closed packing is
In Zinc blende structure, Zn+2 ions are present in alternate tetrahedral voids and S–2 in ccp. The coordination number of Zn+2 and S–2 are respectively
In Zinc blende structure, Zn+2 ions are present in alternate tetrahedral voids and S–2 in ccp. The coordination number of Zn+2 and S–2 are respectively
An element (At. mass = 50 g/mol) having fcc structure has unit cell edge length 400 pm. The density of element is
An element (At. mass = 50 g/mol) having fcc structure has unit cell edge length 400 pm. The density of element is
In a crystalline solid, anion B are arranged in cubic close packing and cation A are equally distributed between octahedral and tetrahedral voids. If all the octahedral voids are occupied, the formula for the solid is
In a crystalline solid, anion B are arranged in cubic close packing and cation A are equally distributed between octahedral and tetrahedral voids. If all the octahedral voids are occupied, the formula for the solid is
A tetrahedral void in fcc is formed by atoms at
A tetrahedral void in fcc is formed by atoms at
Density of crystal decreases in
Density of crystal decreases in
Zinc sulphide exists in two different structural forms as zinc blende (FCC) and Wurtzite (HCP). What will be the coordination number of cation and anion in both the structures?
Zinc sulphide exists in two different structural forms as zinc blende (FCC) and Wurtzite (HCP). What will be the coordination number of cation and anion in both the structures?
F-centers are related to
F-centers are related to
Quartz on strong heating followed by rapid cooling gives glass which is an amorphous solid because
Quartz on strong heating followed by rapid cooling gives glass which is an amorphous solid because
Lithium crystallizes in a body centred cubic lattice, how many next nearest neighbours does each Li has?
Lithium crystallizes in a body centred cubic lattice, how many next nearest neighbours does each Li has?
Water gas is a mixture of
Water gas is a mixture of
An orange coloured solution of K2Cr2O7 acidified with H2SO4 and treated with a substance X gives a blue coloured solution of CrO5. The substance X is
An orange coloured solution of K2Cr2O7 acidified with H2SO4 and treated with a substance X gives a blue coloured solution of CrO5. The substance X is
When 1 mole of PbS reacts completely with
When 1 mole of PbS reacts completely with 
The term hydride gap refers to which region of periodic table?
The term hydride gap refers to which region of periodic table?
2-ethyl anthraquinol when oxidised in air produces
2-ethyl anthraquinol when oxidised in air produces
In alkaline medium, which elements can produce hydrogen?
In alkaline medium, which elements can produce hydrogen?
The boiling point of water is exceptionally high due to
The boiling point of water is exceptionally high due to
The volume strength of 3.57 M solution of hydrogen peroxide is
The volume strength of 3.57 M solution of hydrogen peroxide is
H2O2 can be obtained when following reacts with H2SO4 except with
H2O2 can be obtained when following reacts with H2SO4 except with
For a first order reaction A -> P, the temperature (T) dependent rate constant (k) was found to follow the equation log k = – (2000) 1/T + 6.0. The pre-exponential factor A and the activation energy Ea, respectively, are
For a first order reaction A -> P, the temperature (T) dependent rate constant (k) was found to follow the equation
log k = – (2000) 1/T + 6.0. The pre-exponential factor A and the activation energy Ea, respectively, are
The half life for decay of a radio active isotope is 14 hrs. Determine the fraction of radio isotope remaining undecayed after 30 hours
The half life for decay of a radio active isotope is 14 hrs. Determine the fraction of radio isotope remaining undecayed after 30 hours
A positron is emitted from . The ratio of the atomic mass and atomic number of the resulting nuclide is
A positron is emitted from 
. The ratio of the atomic mass and atomic number of the resulting nuclide is
Consider a reaction aG + bH -> Products. When concentration of both the reactants G and H is doubled, the rate increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is doubled. The overall order of the reaction is
Consider a reaction aG + bH -> Products. When concentration of both the reactants G and H is doubled, the rate increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is doubled. The overall order of the reaction is
For the elementary reaction M -> N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is
For the elementary reaction M -> N, the rate of disappearance of M increases by a factor of 8 upon doubling the concentration of M. The order of the reaction with respect to M is
The concentration of a reactant in a solution falls from 0.2 M to 0.1 M in 2 hours and to 0.05 M in 4 hours. The order of reaction is
The concentration of a reactant in a solution falls from 0.2 M to 0.1 M in 2 hours and to 0.05 M in 4 hours. The order of reaction is
Half life of a chemical reaction at a particular concentration is 50 minutes. When the concentration of the reactant is doubled, the half life becomes 100 minutes, then the order of reaction is
Half life of a chemical reaction at a particular concentration is 50 minutes. When the concentration of the reactant is doubled, the half life becomes 100 minutes, then the order of reaction is
The temperature coefficient of most of the reactions lie between
The temperature coefficient of most of the reactions lie between
The radiation from a naturally occurring radioactive substance as seen after deflection by a magnetic field in one direction are
The radiation from a naturally occurring radioactive substance as seen after deflection by a magnetic field in one direction are
A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is?
A decapeptide (Mol. Wt. 796) on complete hydrolysis gives glycine (Mol. Wt. 75), alanine and phenylalanine. Glycine contributes 47.0% to the total weight of the hydrolysed products. The number of glycine units present in the decapeptide is?
Net charge available on a basic amino acid at pH = 1 would be?
Net charge available on a basic amino acid at pH = 1 would be?
What is the total number of acidic amino acids found in human proteins?
What is the total number of acidic amino acids found in human proteins?
Which form of D-Glucose is more stable?
Which form of D-Glucose is more stable?
1.alpha - D - Glucose
2.Beta - D - Glucose
3. Open Chain
4. All forms are equally stable
Ring structure of glucose is due to formation of hemiacetal and ring formation between
Ring structure of glucose is due to formation of hemiacetal and ring formation between
Acid hydrolysis of sucrose causes
Acid hydrolysis of sucrose causes
Peptides are composed of amino acids joined by amide bonds. which of the following statements is not correct?
Peptides are composed of amino acids joined by amide bonds. which of the following statements is not correct?
A tripeptide is composed equally of L-valine, L-tyrosine and L-alanine (one molecule of each). How many isomeric tripeptides of this kind may exist?
A tripeptide is composed equally of L-valine, L-tyrosine and L-alanine (one molecule of each). How many isomeric tripeptides of this kind may exist?
-helical structure of protein is stabilized by
-helical structure of protein is stabilized by
When protein is subjected to denaturation
When protein is subjected to denaturation
Fructose reduces Tollen’s reagent due to
Fructose reduces Tollen’s reagent due to
In alkaline solution D-glucose, D-mannose and D-fructose are in equilibrium. This reaction is known as
In alkaline solution D-glucose, D-mannose and D-fructose are in equilibrium. This reaction is known as
The total number of isomeric alkenes possible by C4H8 are ____
The total number of isomeric alkenes possible by 
are ____
The total number of alkenes possible by dehydrobromination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is
The total number of alkenes possible by dehydrobromination of 3-bromo-3-cyclopentylhexane using alcoholic KOH is
A hydrocarbon (A) adds one mole of hydrogen in the presence of platinum gives hexane. When (A) was oxidised with KMnO4 it gave a single carboxylic acid, containing three carbon atoms. Give the structure and name of (A)
A hydrocarbon (A) adds one mole of hydrogen in the presence of platinum gives hexane. When (A) was oxidised with KMnO4 it gave a single carboxylic acid, containing three carbon atoms. Give the structure and name of (A)
896 ml vapour of a hydrocarbon ‘A’ having carbon 87.80% and hydrogen 12.19% weighs 3.28 g at STP. Hydrogenation of ‘A’ gives 2-methyl pentane. Also the hydration of hydrocarbon ‘A’ gives compound ‘B’. Compound ‘B’ gives yellow precipitate with sodium hypoiodite. Find the structure of A and give the reactions involved.
896 ml vapour of a hydrocarbon ‘A’ having carbon 87.80% and hydrogen 12.19% weighs 3.28 g at STP. Hydrogenation of ‘A’ gives 2-methyl pentane. Also the hydration of hydrocarbon ‘A’ gives compound ‘B’. Compound ‘B’ gives yellow precipitate with sodium hypoiodite. Find the structure of A and give the reactions involved.
The minimum number of carbon atoms in alkane molecule to show chain isomerism is
The minimum number of carbon atoms in alkane molecule to show chain isomerism is
Alkanes can be iodinated in the presence of
Alkanes can be iodinated in the presence of
In the complete combustion of hydrocarbon the number of oxygen molecules required per mole of hydrocarbon is
In the complete combustion of hydrocarbon 
the number of oxygen molecules required per mole of hydrocarbon is
Highest boiling point is expected for
Highest boiling point is expected for
2.8 g of pure alkene containing only one double bond per molecule, reacts completely with 8 g of bromine in an inert solvent. The molecular formula of alkene is
2.8 g of pure alkene containing only one double bond per molecule, reacts completely with 8 g of bromine in an inert solvent. The molecular formula of alkene is
Among cellulose, poly(vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is?
Among cellulose, poly(vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular force of attraction is weakest is?
1.Nylon.
2.Poly(vinyl chloride)
3.Cellulose.
4.Natural Rubber
How will you synthesize Nylon 6 and Nylon 66?
How will you synthesize Nylon 6 and Nylon 66?
Cellulose acetate is a?
Cellulose acetate is a?
The half life of a first order reaction is 10 min. If initial amount is 0.08 mol L-1 and concentration at some instant is 0.01 mol L-1. What is the time elapsed ?
The half life of a first order reaction is 10 min. If initial amount is 0.08 mol L-1 and concentration at some instant is 0.01 mol L-1. What is the time elapsed ?
The correct order of boiling points of 2, 2-dimethylpropane, 2-methylbutane and n-pentane is
The correct order of boiling points of 2, 2-dimethylpropane, 2-methylbutane and n-pentane is
How many P–H and O–H bonds respectively, are present in molecule?
How many P–H and O–H bonds respectively, are present in 
molecule?
Though the five d-orbitals are degenerate, the first four d-orbitals are similar to each other in shape whereas the fifth d-orbital is different from others. What is the designation of the fifth orbital?
Though the five d-orbitals are degenerate, the first four d-orbitals are similar to each other in shape whereas the fifth d-orbital is different from others. What is the designation of the fifth orbital?
The resistance of 0.01 N solution of an electrolyte was found to be 220 ohm at 298 K using a conductivity cell with a cell constant of 0.88cm–1. The value of equivalent conductance of solution is –
The resistance of 0.01 N solution of an electrolyte was found to be 220 ohm at 298 K using a conductivity cell with a cell constant of 0.88cm–1. The value of equivalent conductance of solution is –
The temperature of an ideal gas is reduced from 927°C to 27°C. the r.m.s. velocity of the molecules becomes.
The temperature of an ideal gas is reduced from 927°C to 27°C. the r.m.s. velocity of the molecules becomes.
Which is not true for beryllium ?
Which is not true for beryllium ?
Which of the following pairs show reverse properties on moving along a period from left to right and from up to down in a group :
Which of the following pairs show reverse properties on moving along a period from left to right and from up to down in a group :
A fire of lithium, sodium and potassium can be extinguished by
A fire of lithium, sodium and potassium can be extinguished by
An ‘fcc’ in a unit cell of aluminium contains the equivalent of how many atoms ?
An ‘fcc’ in a unit cell of aluminium contains the equivalent of how many atoms ?
Moissan boron is
Moissan boron is
If the solutions of NaCl and NaNO3 are mixed in one beaker and the temperature adjusted to 383° K, the contents of the beaker will most likely:
If the solutions of NaCl and NaNO3 are mixed in one beaker and the temperature adjusted to 383° K, the contents of the beaker will most likely:
Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air ?
Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air ?
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dil. HNO3. The anion could be
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dil. HNO3. The anion could be
Given the molecular formula of the hexa-coordinated complexes (i) CoCl3.6NH3, (ii) CoCl3.5NH3, (iii) CoCl3.4NH3 If the number of co-ordinated NH3 molecules in (i), (ii) and (iii) respectively are 6, 5, 4, the primary valencies in (i), (ii) and (iii) are :
Given the molecular formula of the hexa-coordinated complexes (i) CoCl3.6NH3, (ii) CoCl3.5NH3, (iii) CoCl3.4NH3 If the number of co-ordinated NH3 molecules in (i), (ii) and (iii) respectively are 6, 5, 4, the primary valencies in (i), (ii) and (iii) are :
The temperature of an ideal gas is reduced from 927°C to 27°C. the r.m.s. velocity of the molecules becomes.
The temperature of an ideal gas is reduced from 927°C to 27°C. the r.m.s. velocity of the molecules becomes.
Which is not true for beryllium ?
Which is not true for beryllium ?
Which of the following pairs show reverse properties on moving along a period from left to right and from up to down in a group :
Which of the following pairs show reverse properties on moving along a period from left to right and from up to down in a group :
A fire of lithium, sodium and potassium can be extinguished by
A fire of lithium, sodium and potassium can be extinguished by
An ‘fcc’ in a unit cell of aluminium contains the equivalent of how many atoms ?
An ‘fcc’ in a unit cell of aluminium contains the equivalent of how many atoms ?
Moissan boron is
Moissan boron is
If the solutions of NaCl and NaNO3 are mixed in one beaker and the temperature adjusted to 383° K, the contents of the beaker will most likely:
If the solutions of NaCl and NaNO3 are mixed in one beaker and the temperature adjusted to 383° K, the contents of the beaker will most likely:
Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air ?
Which one of the alkali metals, forms only, the normal oxide, M2O on heating in air ?
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dil. HNO3. The anion could be
A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the solution, a white precipitate is obtained which does not dissolve in dil. HNO3. The anion could be
Given the molecular formula of the hexa-coordinated complexes (i) CoCl3.6NH3, (ii) CoCl3.5NH3, (iii) CoCl3.4NH3 If the number of co-ordinated NH3 molecules in (i), (ii) and (iii) respectively are 6, 5, 4, the primary valencies in (i), (ii) and (iii) are :
Given the molecular formula of the hexa-coordinated complexes (i) CoCl3.6NH3, (ii) CoCl3.5NH3, (iii) CoCl3.4NH3 If the number of co-ordinated NH3 molecules in (i), (ii) and (iii) respectively are 6, 5, 4, the primary valencies in (i), (ii) and (iii) are :