WHat is Osmosis and Osmotic Pressure ?

Rajkumar Yadav Chemistry 01 May, 2019 129 views

1.00 g of a non-electrolyte solute dissolved in 50 g of benzene lowered the freezing point of benzene by 0.40 K. The freezing point depression constant of benzene is 5.12 K kg mol–1. Find the molar mass of the solute

Rajkumar Yadav Chemistry 01 May, 2019 126 views

45 g of ethylene glycol (C2H6O2) is mixed with 600 g of water. Calculate (a) the freezing point depression and (b) the freezing point of the solution

Rajkumar Yadav Chemistry 01 May, 2019 160 views

The boiling point of benzene is 353.23 K. When 1.80 g of a non-volatile solute was dissolved in 90 g of benzene, the boiling point is raised to 354.11 K. Calculate the molar mass of the solute. Kb for benzene is 2.53 K kg mol–1

Rajkumar Yadav Chemistry 01 May, 2019 290 views

The vapour pressure of pure benzene at a certain temperature is 0.850 bar. A non-volatile, non-electrolyte solid weighing 0.5 g when added to 39.0 g of benzene (molar mass 78 g mol-1). Vapour pressure of the solution,
then, is 0.845 bar. What is the molar mass of the solid substance?

Anonymous User Chemistry 01 May, 2019 408 views

What is Non-ideal Solutions?

Anonymous User Chemistry 01 May, 2019 56 views

Please explain Raoult’s Law as a special case of Henry’s Law ..

Anonymous User Chemistry 01 May, 2019 65 views

Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 298 K are 200 mm Hg and 415 mm Hg respectively. (i) Calculate the vapour pressure of the solution prepared by mixing 25.5 g of CHCl3 and 40 g of H2Cl2 at 298 K and, (ii) mole fractions of each component in vapour phase.

Anonymous User Chemistry 01 May, 2019 13115 views

What is Effect of Temperature on Solubility?

Anonymous User Chemistry 01 May, 2019 60 views

Explain the  Biological phenomena  of Henry’s law

Anonymous User Chemistry 01 May, 2019 62 views

If N2 gas is bubbled through water at 293 K, how many millimoles of N2 gas would dissolve in 1 litre of water. Assume that N2 exerts a partial pressure of 0.987 bar. Given that Henry’s law constant for N2 at 293 K is
76.48 kbar.

Anonymous User Chemistry 01 May, 2019 6499 views

A box contains 5 different red and 6 different white balls. In how many ways can 6 balls be drawn so that there are at least two balls of each colour ?

abhay Maths 30 Apr, 2019 77 views

A college offers 6 courses in the morning and 4 in the evening. The number of ways a student can select exactly one course, either in the morning or in the evening?

Anonymous User Maths 30 Apr, 2019 977 views

A college offers 6 courses in the morning and 4 in the evening. The possible number of choices with the student if he wants to study one course in the morning and one in the evening is?

Anonymous User Maths 30 Apr, 2019 438 views

a mass of 3kg descending vertically downward supports a mass 2 kg by means of light string passing over a pulley at end of 5 sec the string breaks how much higher 2kg mass will go

Anonymous User Physics 30 Apr, 2019 145 views

Given two events A and B. If odds against A are as 2 : 1 and those in favour of A  B are as 3 : 1, then find the range of P(B)?

Anonymous User Maths 28 Apr, 2019 123 views

Three vertices out of six vertices of a regular hexagon are chosen randomly. The probability of getting a equilateral triangle after joining three vertices is ?

Anonymous User Maths 28 Apr, 2019 102 views

If four cards are drawn at random from a pack of fifty-two playing cards, find the probability that at least one of them is an ace?

Anonymous User Maths 28 Apr, 2019 84 views

From a group of 10 persons consisting of 5 lawyers, 3 doctors and 2 engineers, four persons are selected at random. The probability that the selection contains at least one of each category is?

Anonymous User Maths 28 Apr, 2019 386 views

If the letters of INTERMEDIATE are arranged, then the odds in favour of the event that no two 'E's occur together, are ?

Anonymous User Maths 28 Apr, 2019 1049 views

A bag contains 5 red and 4 green balls. Four balls are drawn at random, then find the probability that two balls are of red and two balls are of green colour?

Anonymous User Maths 28 Apr, 2019 1925 views

Words are formed with the letters of the word PEACE. Find the probability that 2 E’s come together?

Anonymous User Maths 28 Apr, 2019 440 views

A coin is tossed successively three times. Find the probability of getting exactly one head or two heads?

Anonymous User Maths 28 Apr, 2019 598 views

A coin is tossed. If it shows head, we draw a ball from a bag consisting of 3 blue and 4 white balls; if it shows tail we throw a die. Describe the sample space of this experiment.

Anonymous User Maths 28 Apr, 2019 83 views

In a uniform electric field, a cube of side 1 cm is placed. The total energy stored in the cube is 8.85μJ. The electric field is parallel to four of the faces of the cube. The electric flux through any one of the remaining two faces is.

Anonymous User Physics 28 Apr, 2019 1499 views

Suppose that two heat engines are connected in series, such that the heat exhaust of the first engine is used as the heat input of the second engine as shown in figure. The efficiencies of the engines are n1 and n2, respectively. The net efficiency of the combination is given by?

Anonymous User Physics 28 Apr, 2019 1728 views

A charged particle oscillates about its mean equilibrium position with a frequency of  Hz. The electromagnetic waves produced

Anonymous User Physics 28 Apr, 2019 80 views

A magnet is suspended in such a way when it oscillates in the horizontal plane. It makes 20 oscillations per minute at a place where dip angle is 30 and 15 oscillations per min at a place where dip angle is 60 . Find the ratio of the total earth's magnetic field at the two places?

Anonymous User Physics 26 Apr, 2019 122 views

A 1-meter long narrow solenoid having 1000 turns is placed in magnetic meridian. Find the current in the solenoid which neutralises the earth’s horizontal field of 0.36 oersted at the centre of the solenoid

Anonymous User Physics 24 Apr, 2019 687 views

If the dip circle is set at 45 to the magnetic meridian, then the apparent dip is 30 . Calculate the true dip.

Anonymous User Physics 24 Apr, 2019 1839 views

At a certain place, the horizontal component of earth's magnetic field is root  times of the vertical component. What the angle of dip at that place.

Anonymous User Maths 23 Apr, 2019 1418 views

Discuss the local maximum and local minimum values of f(x).

Anonymous User Maths 23 Apr, 2019 62 views

Anonymous User Chemistry 23 Apr, 2019 65 views

Calculate molality of 2.5 g of ethanoic acid (CH3COOH) in 75 g of benzene

Anonymous User Chemistry 23 Apr, 2019 423 views

Calculate the molarity of a solution containing 5 g of NaOH in 450 mL solution

Anonymous User Chemistry 23 Apr, 2019 285 views

Calculate the mole fraction of ethylene glycol (C2H6O2) in a solution containing 20% of C2H6O2 by mass

Anonymous User Chemistry 23 Apr, 2019 932 views

How many Type of Solution exist , please describe

Anonymous User Chemistry 23 Apr, 2019 58 views

What is Solvent and Solute, please explain?

Anonymous User Chemistry 23 Apr, 2019 54 views

What is Solution , please explain?

Anonymous User Chemistry 23 Apr, 2019 58 views

In a group of 1000 people, there are 750 who can speak Hindi and 400 who can speak English. How many can speak Hindi only ?How many can speak English ? How many can speak both Hindi and English?

Anonymous User Maths 22 Apr, 2019 156 views

A billiard ball is hit by a cue at a point distance h above the centre. It acquires a linear velocity v0. Let m be the mass and r be the radius of the ball. The angular velocity acquired by the ball is?

Anonymous User Physics 20 Apr, 2019 298 views

A simple pendulum is suspended in a lift which 5. is going up with an acceleration 5 m/s^2. An electric field of magnitude 5 N/C and directed vertically upward is also present in the lift. The charge of the bob is 1 mC and mass is 1 mg. Taking g =  and length of the simple pendulum 1m, the time period of the simple pendulum is

Anonymous User Physics 20 Apr, 2019 374 views

Calculate the ratio of the speed of sound in neon to that in water vapour at any temperature. [Molecular weight of neon = 2.02 * 10–2 kg/mol and for water vapours = 1.8 * 10–2 kg/mol]

Anonymous User Physics 19 Apr, 2019 663 views

Speed of sound in air is 332 m/s at NTP. What will the speed of sound in hydrogen at NTP if the density of hydrogen at NTP is (1/16) that of air?

Anonymous User Physics 19 Apr, 2019 898 views

Silver forms ccp lattice and X-ray studies of its crystals show that theedge length of its unit cell is 408.6 pm. Calculate the density of silver (Atomic mass = 107.9 u).

Rajkumar Yadav Chemistry 19 Apr, 2019 1450 views

X-ray diffraction studies show that copper crystallises in an fcc unit cell with cell edge of 3.608×10-8 cm. In a separate experiment, copper is determined to have a density of 8.92 g/cm3, calculate the atomic mass of copper

Rajkumar Yadav Chemistry 19 Apr, 2019 197 views

An element has a body-centred cubic (bcc) structure with a cell edge of 288 pm. The density of the element is 7.2 g/cm3. How many atoms are present in 208 g of the element?

Rajkumar Yadav Chemistry 19 Apr, 2019 206 views

What is Packing Efficiency?Explian

Rajkumar Yadav Chemistry 19 Apr, 2019 54 views