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प्रश्न
Assertion (A): Combustion of all organic compounds is an exothermic reaction.
Reason (R): The enthalpies of all elements in their standard state are zero.
पर्याय
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
MCQ
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उत्तर
Both A and R are true but R is not the correct explanation of A.
Explanation:
The enthalpy of the reactants is always greater than the enthalpy of the product in a combustion reaction.
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