17. The ratio of mean kinetic energy of hydrogen and nitrogen at temperature 300 K and 450 K respectively is
(a) 3 : 2 (b) 2 : 3
(c) 2 : 21 (d) 4 : 9
Answer-b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a