In the following questions a statement of Assertion (A) followed by a statement of Reason (R ) is given. Choose the correct option out of the choices given below. Assertion (A) : Combustion of all organic compounds is an exothermic reaction. Reaction (R ) : The enthalpies of all elements in their standard state are zero.

In the following questions a statement of Assertion (A) followed by a

1.	In the following questions a statement of Assertion (A) followed by a statement of Reason (R ) is given. Choose the correct option out of the choices given below. Assertion (A) : Combustion of all organic compounds is an exothermic reaction. Reaction (R ) : The enthalpies of all elements in their standard state are zero.
Answer» Solution :CORRECT EXPLANATION. In a COMBUSTION reaction, SUM of enthalpies of REACTANTS is greater than the sum of theenthalpied of products.