An oxide of metal (at. , mass = 112) contain 12.5% O2 by mass. The oxide was converted into chloride by treatment with HCl and electrolyzed. Calc
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 :
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)
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:
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:
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 :