RRB ALP practice question
Two ideal gases A and B have molecular weights in the ratio 1:3. Equal masses of A and B are mixed to form a gas mixture with total pressure P atm. What is the partial pressure (in atm) of gas B in the mixture?
From a RRB ALP Science practice set · Science
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Correct answer: (C) P/4
For equal mass m, moles = m/M. Moles of A : Moles of B = (m/1):(m/3) = 3:1. Mole fraction of B = 1/4. Partial pressure of B = P/4.
हिंदी में प्रश्न
दो आदर्श गैसों A और B के आणविक भार 1:3 के अनुपात में हैं। A और B के बराबर द्रव्यमान को मिलाकर एक गैस मिश्रण बनाया जाता है जिसका कुल दाब P atm है। मिश्रण में गैस B का आंशिक दाब (atm में) क्या है?
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सही उत्तर: (C) P/4
बराबर द्रव्यमान m के लिए, मोल = m/M. मोल A : मोल B = (m/1):(m/3) = 3:1. B का मोल अंश = 1/4. B का आंशिक दाब = P/4.
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