MPSC PYQ

MPSC Rajyaseva 2013 GS Paper 1 — Question 68

The correct answer with a full explanation. Practice Chemistry questions as a quiz →

जर फुग्यामध्ये कोरडी हवा भरली तर त्यामध्ये असलेल्या 79% नायट्रोजन आणि 21% ऑक्सिजन पैकी कोणत्या घटकांची 25° सेल्सियसला सर्व प्रथम बाहेर गळती होईल? If balloon is filled with dry air which contains mixture of 79% N₂ and 21% O₂ at 25°C then which component of the air will effuse out first ?

(a)ऑक्सिजन, कारण त्याचे वस्तुमान नायट्रोजन पेक्षा जास्त आहे.

(b)नायट्रोजन, कारण त्याचे वस्तुमान ऑक्सिजन पेक्षा कमी आहे.

(c)ऑक्सिजन आणि नायट्रोजन दोघांची एकाच वेळेला गळती होईल.

(d)सर्व भरलेली हवा गळती होऊन फुगा मूळ स्वरूप प्राप्त करेल.

1)(a) आणि (b) / (a) and (b)
2)(c) आणि (d) / (c) and (d)
3)(a) फक्त / (a) only
4)(b) फक्त / (b) only✓ Correct

According to Graham's law of effusion, the rate of effusion of a gas is inversely proportional to the square root of its molar mass. Since Nitrogen (M = 28) is lighter than Oxygen (M = 32), Nitrogen effuses out first.

MPSC has asked 119 Chemistry questions.

Try them as a quick quiz, instant answers and explanations, no signup.

Want a high-yield PYQ explained daily?Free on our Telegram channel — one real MPSC question, fully explained, every morning.Join →
Didn't find what you were looking for?