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 |
 62%
From NCERT
NEET - 2017
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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 |
 54%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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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
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NEET 2023 - Target Batch - Aryan Raj Singh
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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 |
 60%
From NCERT
NEET - 2016
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NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh

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
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NEET 2023 - Target Batch - Aryan Raj Singh
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