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Standard VIII

Chemistry

Endothermic and Exothermic Reaction

Assertion :A ...

Question

Assertion :A reaction will be spontaneous if $△$ H is negative and $△$ S is positive Reason: $△$ G will be negative when there is a decrease in enthalpy and an increase in entropy

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Assertion
A reaction will be spontaneous if △ H is negative and △ S is positive
Reason
△ G will be negative when there is a decrease in enthalpy and an increase in entropy
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
$Δ G = Δ H - T Δ S$

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Assertion (A) p-nitrophenol is more acidic than phenol.
Reason (R) Nitro group helps in the stabilisation of the phenoxide ion by dispersal of negative charge due to resonance.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.

Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

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Assertion :A reaction will be spontaneous if △H is negative and △S is positive Reason: △G will be negative when there is a decrease in enthalpy and an increase in entropy

Assertion :A reaction will be spontaneous if $△$ H is negative and $△$ S is positive Reason: $△$ G will be negative when there is a decrease in enthalpy and an increase in entropy