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Q.

In which process net work done is zero?
(i) Cyclic 
(ii) Free expansion
(iii) Isochoric 
(iv) Adiabatic

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a

(ii, iv)

b

(iii, iv)

c

(ii, iii)

d

(i, ii)

answer is B.

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Detailed Solution

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expansion in vacuum does not need work done and at constant volume also work done is zero.

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