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Question

Statement 1: A synthesis reaction that is non-spontaneous and has a negative value for its heat of reaction will not occur until some heat is added.
Statement 2: Non-spontaneous exothermic reactions need enough activation energy to get them started.

A

Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

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B

Both Statement 1 and Statement 2 are correct and Statement 2 is not the correct explanation of Statement 1.

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C

Statement 1 is correct but Statement 2 is not correct.

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D

Statement 1 is not correct but Statement 2 is correct.

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E

Both the Statement 1 and Statement 2 are not correct.

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Solution

The correct option is A

Both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.


Statement 1: A synthesis reaction that is non-spontaneous and has a negative value for its heat of reaction will not occur until some heat is added.
A negative value for its heat of reaction indicates that the reaction is exothermic reaction. Such reactions are favored at low temperature or when heat is removed. But the reaction will not start until certain heat is supplied to overcome the activation energy barrier.
Statement 2: Non-spontaneous exothermic reactions need enough activation energy to get them started.
Hence, both Statement 1 and Statement 2 are correct and Statement 2 is the correct explanation of Statement 1.

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