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    				| 1. | An idel gas undrgoes isothermal process from some initial state `i` to final state `f`. Choose the correct alternatives.A. `dU=0`B. `dQ=0`C. `dQ=dU`D. `dQ=dW` | 
| Answer» Correct Answer - A::D For an isothermal process change in temperature of the system `dT=0rArrT=` constant. We know that for an ideal gas `dU` = change in internal energy `=nC_(v)" "dT=0` [where, n is number of moles and `C_(v)` is specific heat capacity at constant volume ] From first law of thermodynamics, `dQ=dU+dW` `=0+dWrArrdQ =dW ` | |