a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Assertion: Rusting of Iron is endothermic in nature.
Reason: As the reaction is slow, the release of heat is barely evident.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true.
Assertion: Rusting of Iron is endothermic in nature.
Reason: As the reaction is slow, the release of heat is barely evident.
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Verified answer
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The correct answer is:
b) Both A and R are true, and R is not the correct explanation of A.
Explanation:
A) Rusting of iron is endothermic in nature: This statement is true. Rusting is indeed an endothermic process, meaning it absorbs heat from its surroundings.
R) As the reaction is slow, the release of heat is barely evident: This statement is also true. In rusting, the reaction occurs over a period of time, and the heat released is not easily noticeable because it is spread out over the duration of the reaction.
While both statements are true, the reason (R) is not the correct explanation of the assertion (A). Rusting being endothermic is due to the nature of the chemical reaction itself and not solely because the reaction is slow.