66. The r.m.s. speed of a certain gas is v at 400K. The temperature at which the r.m.s. speed becomes two times, will be
(a) 800 K (b) 1600 K
(c) 1200 K (d) None of these
Answer-b
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a