Assertion :An exothermic process which is non-spontaneous at high temperature may become spontaneous at low temperature. Reason: Spontaneous process is an irreversible process and may be reversed by some external agency.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
$Δ G = Δ H + T Δ S$
for the reaction to be spontaneous
$Δ G$ Should be negative. for exothermic
reaction $Δ H$ is negative but if temp.
is high and $Δ S$ is +ve $Δ G$ may
become +ve so at cow temp $Δ G$
becomes -ve due to -ve OH. is
greater than $T Δ S .$
Assertion is correct reason is correct
but Reason is not correct explanation.

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Similar questions

Q. Assertion :Spontaneous process is an irreversible process and may be reversed by some external agency. Reason: Decrease in enthalpy is a contributory factor for spontaneity.

Q. Assertion :An exothermic process, non-spontaneous at high temperature, amy become spontaneous at low temperature. Reason: With decrease in temperature, randomness (entropy) decreases.

Read the above assertion and reason and choose the correct option regarding it.

Q. Assertion :An exothermic process, non-spontaneous at high temperature, may become spontaneous at low temperature. Reason: With decrease in temperature, randomness (entropy) decrease.

Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(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.

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

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