During an isothermal expansion of an ideal gas
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Verified by ExpertsThe correct answer is:
D
Temperature remains constant in an isothermal process. In an ideal gas, the internal energy
depends only upon the temperature of the gas. When an ideal gas undergoes an isothermal change, there is no change in its internal energy ( 
). From first law of thermodynamics 
For isothermal change 
Hence, in an isothermal process in an ideal gas the heat absorbed by the gas is entirely used in the work done by the gas.
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