Q. No.The unit that relates concentration of solution with its vapour pressure is:
| 1. | Mole fraction. | 2. | Parts per million. |
| 3. | Mass percentage. | 4. | Molality. |
On dissolving sugar in water at room temperature solution feels cool to touch. Dissolution of sugar will be most rapid under the following case is:
1. Sugar crystals in cold water
2. Sugar crystals in hot water
3. Powdered sugar in cold water
4. Powdered sugar in hot water
At equilibrium the rate of dissolution of a solid solute in a volatile liquid solvent is ...... .
1. Less than the rate of crystallisation
2. Greater than the rate of crystallisation
3. Equal to the rate of crystallisation
4. Zero
Low concentration of oxygen in the blood and tissues of people living at high altitude is due to .........
1. Low temperature
2. Low atmospheric pressure
3. High atmospheric pressure
4. Both low temperature and high atmospheric pressure
Match the items given in Column I with the type of solutions given in Column II.
| Column I | Column II |
| A. Soda water | 1. A solution of gas in solid |
| B. Sugar solution | 2. A solution of gas in liquid |
| C. German silver | 3. A solution of solid in liquid |
| D. Hydrogen gas in palladium | 4. A solution of solid in solid |
Codes
| A | B | C | D | |
| 1. | 2 | 1 | 4 | 3 |
| 2. | 1 | 2 | 3 | 4 |
| 3. | 2 | 3 | 4 | 1 |
| 4. | 4 | 1 | 3 | 2 |
The value of Henry's constant KH -
1. Increases with increase in temperature.
2. Decreases with increase in temperature.
3. Remains constant.
4. First increases then decreases.
The value of Henry's constant, KH is ......... .
1. Greater for gases with higher solubility.
2. Greater for gases with lower solubility.
3. Constant for all gases.
4. Not related to the solubility of gases.
4 L of 0.02 M aqueous solution of NaCl was diluted by adding 1 L of water. The molarity of the resultant solution is -
| 1. | 0.004 M | 2. | 0.008 M |
| 3. | 0.012 M | 4. | 0.016 M |
KH value for Ar(g), CO2 (g), HCHO (g) and CH4(g) are 40.39, 1.67, 1.83 x and 0.413 respectively.
Arrange these gases in the order of their increasing solubility.
1. HCHO < CH4 < CO2 < Ar
2. HCHO < CO2 < CH4 < Ar
3. Ar < CO2 < CH4 < HCHO
4. Ar < CH4 < CO2 < HCHO
Which of the following factor (s) affect the solubility of a gaseous solute in the fixed volume of liquid solvent?
(i) Nature of solute
(ii) Temperature
(iii) Pressure
a. (i) and (iii) at constant T
b. (i) and (ii) at constant p
c. (ii) and (iii)
d. Only (iii)
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
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