# At 100 °C the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb = 0.52, the boiling point of this solution will be: 1. 100 oC 2. 102 oC 3. 103 oC 4. 101 oC

Subtopic:  Relative Lowering of Vapour Pressure | Elevation of Boiling Point |
59%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

Consider the following liquid-vapor equilibrium
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. $$\frac{dlnG}{dT^2}=\frac{-\Delta H_v}{RT^2}$$
Subtopic:  Introduction & Colligative properties |
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

The incorrect statement among the following for an ideal solution is:

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. $$\Delta G_{\text{Mix}}=0$$
Subtopic:  Raoult's Law |
81%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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

Subtopic:  Relative Lowering of Vapour Pressure |
55%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints

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

Subtopic:  Van’t Hoff Factor |
61%
From NCERT
NEET - 2016
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

The temperature dependent term among the following is -

 1 Molality 2 Molarity 3 Mole fraction 4 Weight percentage
Subtopic:  Concentration Terms & Henry's Law |
83%
From NCERT
NEET - 2017
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch

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

Subtopic:  Depression of Freezing Point |
61%
From NCERT
NEET - 2017
To view explanation, please take trial in the course.
NEET 2025 - Target Batch
Hints
To view explanation, please take trial in the course.
NEET 2025 - Target Batch