1.

Work done by air when it expands from 50 litres to 150 litres at a constant pressure of 2 atmosphere is

A.            \[2\times {{10}^{4}}\]joules  
B.            \[2\times 100\]joules
C.            \[2\times {{10}^{5}}\times 100\]joules                         
D.            \[2\times {{10}^{-5}}\times 100\]joules
Answer» B.            \[2\times 100\]joules


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