MHT CET 2021 22th September Evening Shift | Liquid Solution Question 117 | Chemistry

What is Henry's law constant if solubility of a gas in water at $$298 \mathrm{~K}$$ and 1 bar pressure is $$7\times10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}$$ ?

$$2.0 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}$$ bar$$^{-1}$$

$$7.0 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{bar}^{-1}$$

$$3.5 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1}$$ bar$$^{-1}$$

$$3.1 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1}$$ bar$$^{-1}$$

MHT CET 2021 22th September Evening Shift

MCQ (Single Correct Answer)

-0

Which of the following formulae is used to obtain depression in freezing point?

$$\Delta T_f=\frac{T_f^{\circ}}{T_f}$$

$$\Delta T_f=T_f^{\circ}-T_f$$

$$\Delta \mathrm{T}_{\mathrm{f}}-\mathrm{T}_{\mathrm{f}}=\mathrm{T}_{\mathrm{f}}^{\circ}$$

$$\Delta T_f=\frac{T_f}{T_f^{\circ}}$$

MHT CET 2021 22th September Morning Shift

MCQ (Single Correct Answer)

-0

The vapour pressure of a solvent decreases by 2.5 mm Hg by adding a solute. What is the mole fraction of solute? (Vapour pressure of pure solvent is 250 mm Hg)

0.88

0.01

0.1

0.99

MHT CET 2021 22th September Morning Shift

MCQ (Single Correct Answer)

-0

Molal depression constant for a liquid is $$2.77^{\circ} \mathrm{C} ~\mathrm{kg} ~\mathrm{mol}^{-1}$$, in Kelvin scale it's value is

$$275.77 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$

$$271.77 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$

$$2.77 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$

$$27.7 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$$

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