11. For a gas, the r.m.s. speed at 800 K is
(a) Four times the value at 200 K
(b) Half the value at 200 K
(c) Twice the value at 200 K
(d) Same as at 200 K
Answer-c
(12)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)