Q.

For exothermic and endothermic reaction, the sign of qp respectively are

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a

positive, negative

b

positive, positive

c

negative, negative

d

negative, positive

answer is D.

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Detailed Solution

In an exothermic reaction, heat is evolved and system loses heat to the surroundings. Therefore, qp will be negative and ∆r, H will also be negative. In an endothermic reaction, heat is absorbed, qp is positive and ∆rH will be positive.
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For exothermic and endothermic reaction, the sign of qp respectively are