Assertion: `DeltaH` and `DeltaE` are almost the same for the reaction. `N_(2)(g)+O_(2)(g) hArr 2NO(g)`
Reason: All reactants and products are gases.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.

Answer

A

Explanation

The enthalpies of neutralisation of strong acids and strong bases are same they are 13.7 kcal. The reason is that it is heat of formation of water from `H^(+) and OH^(-)` ions. `H^(+)+ OH^(-) rarr H_(2)O, Delta H =-13.7` kcal. Thus, both assertion and reason are true.