100 g of liquid A (molar mass 140 g mol–1) was dissolved in 1000 g of liquid B (molar mass 180 g mol–1). The vapour pressure of pure liquid B was found to be 500 torr. If the total vapour pressure of the solution is 475 torr, the vapour pressure of pure liquid A will be:
1. | 326 torr | 2. | 226 torr |
3. | 360.7 torr | 4. | 280.7 torr |
The amount of CaCl2 (i = 2.47) dissolved in 2.5 litre of water such that its osmotic pressure is 0.75 atm at 27 °C is:
1. | 1.02 g | 2. | 4.35 g |
3. | 2.87 g | 4. | 3.42 g |
If 22 g of benzene is dissolved in 122 g of CCl4, the mass percentage of CCl4 and benzene respectively are-
1.
2.
3.
4. 91.28 %, 8.72 %
The type of inter molecular interactions present in
(a) | Methanol and Acetone | (i) | Van der Waal’s forces of attraction |
(b) | Acetonitrile and Acetone | (ii) | ion-dipole interaction |
(iii) | dipole-dipole interaction |
(a) | (b) | |
1. | (iii) | (ii) |
2. | (ii) | (ii) |
3. | (iii) | (iii) |
4. | (iii) | (i) |
To make 2.5 kg of 0.25 m aqueous solution, the mass of urea required is-
1. | 73 g | 2. | 37 g |
3. | 48 g | 4. | 24 g |
The solubility of H2S in water at STP is 0.195 m. The value of Henry's constant is-
1. | 274 atm | 2. | 285 atm |
3. | 295 atm | 4. | 278 atm |
The vapour pressure of water in the solution having 50 g of urea dissolved in 850 g of water is-
(Vapor pressure of pure water at 298 K is 23.8 mm Hg)
1. 23.40 mm of Hg
2. 33.46 mm of Hg
3. 12.76 mm of Hg
4. 87.12 mm of Hg
The solubility of a gas in a liquid decreases with an increase in temperature because:
1. | Dissolution of a gas in a liquid is an endothermic process. |
2. | Dissolution of a gas in a liquid is an exothermic process. |
3. | Gases are highly compressible. |
4. | All of the above. |
To minimize the painful effects accompanying deep sea diving, oxygen diluted with less soluble helium gas is used as breathing gas by the divers. This is an example of the application of:
1. | Raoult's law | 2. | Henry's law |
3. | Ideal gas Equation | 4. | All of the above |
Type of solution | Example |
a. Solid in gas | i. Aerated water |
b. Gas in liquid | ii. Smoke |
c. Liquid in solid | iii. Solution of hydrogen in palladium |
d. Gas in solid | iv. Amalgams |
a | b | c | d | |
1. | i | iii | iv | ii |
2. | ii | i | iv | iii |
3. | iii | i | iv | ii |
4. | iv | i | ii | iii |