WB JEE 2017 | Liquid Solution Question 9 | Chemistry

WB JEE 2017

MCQ (Single Correct Answer)

-0.25

Assuming the compounds to be completely dissociated in aqueous solution, identify the pair of the solutions that can be expected to be isotonic at the same temperature.

0.01 M urea and 0.01 M NaCl

0.02 M NaCl and 0.01 M Na₂SO₄

0.03 M NaCl and 0.02 M MgCl₂

0.01 M sucrose and 0.02 M glucose

WB JEE 2016

MCQ (Single Correct Answer)

-0.25

If p$$^\circ$$ and p are the vapour pressure of the pure solvent and solution and n₁ and n₂ are the moles of solute and solvent respectively in the solution then the correct relation between p and p$$^\circ$$ is

$$p^\circ = p\left[ {{{{n_1}} \over {{n_1} + {n_2}}}} \right]$$

$$p^\circ = p\left[ {{{{n_2}} \over {{n_1} + {n_2}}}} \right]$$

$$p = p^\circ \left[ {{{{n_2}} \over {{n_1} + {n_2}}}} \right]$$

$$p = p^\circ \left[ {{{{n_1}} \over {{n_1} + {n_2}}}} \right]$$

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