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4. The pressure in the tyre of a car is four times the atmospheric pressure

at 300 K. If this tyre suddenly bursts, its new temperature will be ( γ=1.4)

(a)     300 (4)1.4/0.4                 (b)  300(1/4)-0.4/1.4

(c)    300(2)-0.4/1.4               (d)    300(4)-0.4/1.4

Ans. d

(43)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is
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(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (118)

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