31. The temperature of the hydrogen at which the average speed of its molecules is equal to that of oxygen molecules at a temperature of 31°C, is
(a) – 216°C (b) – 235°C
(c) – 254°C (d) – 264°C
Answer-c
(18)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (126)