# Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas ? (Assume non-expansion work is zero)Option 1)Isochoric process : $\Delta U=q$Option 2)Adiabatic process : $\Delta U=-w$Option 3)Isothermal process: $q=-w$  Option 4)Cyclic process : $q=-w$

Adiabatic process :-$q=0$

According to first law of thermodynamics

$\Delta V=q+w$

So,$\Delta V=w$

Hence option 2 is incorrect.

Option 1)

Isochoric process : $\Delta U=q$

Option 2)

Adiabatic process : $\Delta U=-w$

Option 3)

Isothermal process: $q=-w$

Option 4)

Cyclic process : $q=-w$

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