MHT CET 2023 Chemistry question

What is the solubility of a gas in water at 25°C if partial pressure is 0.18 atm? ( = 0.16 mol dmatm)

(A)0.29 mol dmCorrect
(B)0.022 mol dm
(C)0.032 mol dm
(D)0.038 mol dm

Answer: (A)

Solution

By Henry's law in terms of concentration, S = K_H \times p = 0.16\ \mathrm{mol\,dm^{-3}atm^{-1}} \times 0.18\ atm = 0.0288 \approx 0.029\ \mathrm{mol\,dm^{-3}}. Of the printed options, only (a) 0.29 has the same digits (2 and 9) as the

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Question ID VK-095176