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 an increase in temperature. |
2. | Decreases with an 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)