Assertion (A). Combustion of all organic...

Assertion (A). Combustion of all organic compounds is an exothermic reaction.
Reason (R). The enthalpies of all elements in their standard state are zero

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The correct Answer is:

Correct explanation. In a combustion reaction, sum of enthalpies of reactants is greater than the sum of theenthalpied of products.

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The enthalpies of all elements in their standard states are

unity

zero

`lt 0`

different for each element.

less than zero

different for each element

zeor

unity

Statement-1 is True, Statement -2 is True, Statement-2 is a correct explanation for Statement-1.

Statement -1 is True ,Starement -2 is True ,Statement-2 is not a correct explanation for Statement-1

Statement-1 is True ,Statement-2 is False.

Statement-1 is False ,Statement-2 is True.