- 1(current)
Q. No.What happens to the value of the molal depression constant (Kf) when the molality of a dilute solution is doubled?
1. It becomes doubled
2. It becomes halved
3. It becomes tripled
4. It remains unchanged
The temperature dependent term among the following is:
| 1. | Molality | 2. | Molarity |
| 3. | Mole fraction | 4. | Weight percentage |
The van't Hoff factor [i] for a dilute aqueous solution of the strong electrolyte barium hydroxide is?
(1) 0
(2) 1
(3) 2
(4) 3
Which of the following statements about the composition of the vapour over an ideal 1:1
molar mixture of benzene and toluene is correct? Assume that the temperature is
constant at 25°C.
(Given, vapour pressure data at 25°C, benzene = 12.8 kPa, toluene = 3.85 kPa)
1. The vapour will contain a higher percentage of toluene
2. The vapour will contain equal amounts of benzene and toluene
3. Not enough information is given to make a prediction
4. The vapour will contain a higher percentage of benzene
1. \(\Delta H_{\text{Mix}}=0\)
2. \(\Delta U_{\text{Mix}}=0\)
3. \(\Delta P=P_{\text{obs.}}-P_{\text{(Calculated by Raoult's law)}}=0\)
4. \(\Delta G_{\text{Mix}}=0\)
| 1. | 100 oC | 2. | 102 oC |
| 3. | 103 oC | 4. | 101 oC |
Liquid ↔ Vapour
Which of the following relation is correct?
| 1. | \(\dfrac{dlnp}{dT}=\frac{-\Delta H_v}{RT}\) | 2. | \(\dfrac{dlnp}{dT^2}=\frac{-\Delta H_v}{T^2}\) |
| 3. | \(\dfrac{dlnp}{dT}=\frac{\Delta H_v}{RT^2}\) | 4. | \(\dfrac{dlnG}{dT^2}=\frac{-\Delta H_v}{RT^2}\) |
- 1(current)
Q. No.
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