MHT CET 2023 12th May Morning Shift | Liquid Solution Question 18 | Chemistry

Calculate molality of solution of a nonvolatile solute having boiling point elevation $$1.89 \mathrm{~K}$$ if boiling point elevation constant of solvent is $$3.15 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$.

0.4 m

0.8 m

0.6 m

0.3 m

MHT CET 2023 11th May Evening Shift

MCQ (Single Correct Answer)

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A solution of nonvolatile solute is obtained by dissolving $$1.5 \mathrm{~g}$$ in $$30 \mathrm{~g}$$ solvent has boiling point elevation $$0.65 \mathrm{~K}$$. Calculate the molal elevation constant if molar mass of solute is $$150 \mathrm{~g} \mathrm{~mol}^{-1}$$.

$$1.95 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$

$$2.23 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$

$$1.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$

$$2.72 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$

MHT CET 2023 11th May Evening Shift

MCQ (Single Correct Answer)

-0

Identify the FALSE statement about ideal solution from following.

Ideal solutions obey Raoult's law over entire range of concentration.

No heat is evolved or absorbed when two components forming an ideal solution are mixed.

Volume of ideal solution is same as sum of volumes of two components taken for mixing.

The vapour pressure of ideal solution is either higher or lower than vapour pressure of pure components.

MHT CET 2023 11th May Evening Shift

MCQ (Single Correct Answer)

-0

Calculate osmotic pressure of $$0.2 \mathrm{~M}$$ aqueous $$\mathrm{KCl}$$ solution at $$0^{\circ} \mathrm{C}$$ if van't Hoff factor for $$\mathrm{KCl}$$ is 1.83. $$\left[\mathrm{R}=0.082 \mathrm{~dm}^3 \mathrm{~atm} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right]$$

$$8.2 \mathrm{~atm}$$

$$9.4 \mathrm{~atm}$$

$$10.6 \mathrm{~atm}$$

$$6.5 \mathrm{~atm}$$

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