The Henry's law constant KH values of three gases (A, B, C) in water are 145, 2 × 10–5 and 35 kbar, respectively. The solubility of these gases in water follow the order:
1. B > C > A
2. A > C > B
3. A > B > C
4. B > A > C
Subtopic:  Concentration Terms & Henry's Law |
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From NCERT
NEET - 2024
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The plot of osmotic pressure $$(\pi)$$ vs concentration $$(mol L^{-1})$$ for a solution gives a straight line with slope 25.73 L bar mol-1. The temperature at which osmotic pressure measurement is done is: $$(\text {Use} \left.\mathrm{R}=0.083 \mathrm{~L} \mathrm{bar} \mathrm{mol}^{-1} \mathrm{~K}^{-1}\right)$$
1. 310°C
2. 25.73°C
3. 12.05 °C
4, 37°C
Subtopic:  Osmosis & Osmotic Pressure |
From NCERT
NEET - 2024
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Which of the following pair of aqueous solutions will have the same value of osmotic pressure? (Assume complete dissociation in aqueous solution)

1. $$0.1~ \mathrm{M}~ \mathrm{BaCl}_2 \text { and } 0.2 ~\mathrm{M} ~\mathrm{K}_2 \mathrm{SO}_4$$
2. $$0.1~ \mathrm{M}~ \mathrm{Na}_3 \mathrm{PO}_4 \text { and } 0.1 ~\mathrm{M}~ \mathrm{K}_2 \mathrm{SO}_4$$
3. $$0.2~ \mathrm{M}~ \mathrm{NaCl} \text { and } 0.1 ~\mathrm{M} ~\mathrm{K}_2 \mathrm{SO}_4$$
4. $$0.2 ~\mathrm{M} ~\mathrm{NaCl} \text { and } 0.1~ \mathrm{M} ~\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$$
Subtopic:  Osmosis & Osmotic Pressure |
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From NCERT
NEET - 2024
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Match List-I with List-II
 List-I (Reagent) List-II (Name of the reaction) A. $$Liquid \rightleftharpoons Vapour$$ I. Melting point B. $$Solid \rightleftharpoons Liquid$$ II. Boiling point C. $$Solid \rightleftharpoons Vapour$$ III. Sublimation point D. $$\small {Solute (solid) \rightleftharpoons Solute (solution)}$$ IV. Saturated solution V. Unsaturated solution
Choose the correct answer from the options given below:
1. A-II, B-I, C-III, D-IV
2. A-I, B-II, C-III, D-IV
3. A-III, B-II, C-I, D-IV
4. A-II, B-I, C-III, D-V
Subtopic:  Introduction & Colligative properties |
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NEET - 2024
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When 5 g of non-volatile non-electrolyte solute is dissolved in 100 g of a certain solvent, the freezing point of the solvent decreases by 0.25 K. The molar mass of the solute is:
$$[\text{K}_f$$ of the given solvent $$=1.2 \mathrm{K ~kg}~ \mathrm{mol}^{-1}]$$
 1 $$242.8 \mathrm{~g} \mathrm{~mol}^{-1}$$ 2 $$238.2 \mathrm{~g} \mathrm{~mol}^{-1}$$ 3 $$241.8 \mathrm{~g} \mathrm{~mol}^{-1}$$ 4 $$240.0 \mathrm{~g} \mathrm{~mol}^{-1}$$
Subtopic:  Depression of Freezing Point |
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From NCERT
NEET - 2024
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Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R):
 Assertion (A): Helium is used to dilute oxygen in the diving apparatus. Reason (R): Helium has a high solubility in O2.
In light of the above statements, choose the correct answer from the options given below:
 1 (A) is False but (R) is True. 2 Both (A) and (R) are True and (R) is the correct explanation of (A). 3 Both (A) and (R) are True and (R) is not the correct explanation of (A). 4 (A) is True but (R) is False.
Subtopic:  Concentration Terms & Henry's Law |
From NCERT
NEET - 2023
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Which of the following aqueous solutions of electrolytes will exhibit the least elevation in boiling point?

 1 0.05 M NaCl 2 0.1 M KCl 3 0.1 M MgSO4 4 1 M NaCl
Subtopic:  Van’t Hoff Factor |
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From NCERT
NEET - 2023
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One molal solution contains 0.5 moles of a solute in:
 1 1000 g of solvent 2 500 mL of solvent 3 500 g of solvent 4 100 mL of solvent
Subtopic:  Concentration Terms & Henry's Law |
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From NCERT
NEET - 2022
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One mole of sugar is dissolved in three moles of water at 298 K. The relative lowering of vapour pressure is:

 1 0.25 2 0.15 3 0.5 4 0.33
Subtopic:  Relative Lowering of Vapour Pressure |
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NEET - 2022
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KH value for some gases at the same temperature 'T' are given:
 gas KH/k bar Ar 40.3 CO2 1.67 HCHO 1.83 × 10–5 CH4 0.413
KH is Henry's Law constant in water. The order of their solubility in water is :
 1 Ar < CO2 < CH4 < HCHO 2 Ar < CH4 < CO2 < HCHO 3 HCHO < CO2 < CH4 < Ar 4 HCHO < CH4 < CO2 < Ar
Subtopic:  Concentration Terms & Henry's Law |
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From NCERT
NEET - 2022
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