5. Work done by air when it expands from 50 litres to 150 litres at a constant pressure of 2 atmosphere is
(a) 2×104 joules (b) 2×100 joules
(c) 2×105×100 joules (d) 2×10–5×100 joules
Answer-a
(11)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)