- 1(current)
Q. No.If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be?
(1) doubled
(2) halved
(3) tripled
(4) 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. \(\Delta G_{\text{Mix}}=0\)
Liquid ↔ Vapour
Which of the following relation is correct?
1. \(\frac{dlnp}{dT}=\frac{-\Delta H_v}{RT}\)
2. \(\frac{dlnp}{dT^2}=\frac{-\Delta H_v}{T^2}\)
3. \(\frac{dlnp}{dT}=\frac{\Delta H_v}{RT^2}\)
4. \(\frac{dlnG}{dT^2}=\frac{-\Delta H_v}{RT^2}\)
- 1(current)
Q. No.
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