Statement I: An exothermic reaction has a positive △H. Statement II: Heat is released in an exothermic reaction.
A
Statement I and statement II are true, and statement II is the correct explanation of statement I
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B
Statement I and statement II are true but statement II is not the correct explanation of statement I
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C
Statement I is true and statement II is false
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D
Statement I is false and statement II is true
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E
Statement I is false and statement II is false
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Solution
The correct option is B Statement I is false and statement II is true An exothermic reaction is a chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction. Expressed in a chemical equation:
reactants → products + energy.
An exothermic reaction has a negative △H so statement 1 is false.