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6. ⇒ (MHT CET 2021 21th September Evening Shift )

In which of the following salts, the solubility increases appreciably with increase in temperature?

A. KBr

B. NaBr

C. NaCl

D. KCl

Correct Option is (A)

Solubilities of NaBr, NaCl and KCl changes slightly with temperature.

7. ⇒ (MHT CET 2021 20th September Evening Shift )

Henry's law constant for ${CH}_{3} Br$ is $0.16 mol L^{- 1} {bar}^{- 1}$ at $298 K$ . What pressure is required to have solubility of $0.08 mol L^{- 1}$ ?

A. $0.24 bar$

B. $1.6 bar$

C. $0.5 bar$

D. $4.0$ bar

Correct Option is (C)

$K_{H} = 0.16 mol L^{- 1} {bar}^{- 1}, S = 0.08 mol L^{- 1}$

According to Henry's law,

$\begin{aligned} S & = K_{H} P \\ ∴ P & = \frac{S}{K_{H}} = \frac{0.08 {molL}^{- 1}}{0.16 mol L^{- 1} {bar}^{- 1}} = 0.5 bar \end{aligned}$

⇒Solution