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Question

Assertion :Formation of an ionic compound will always be an exothermic in nature. Reason: Entropy decrease in the formation of an ionic compound can be compensated only when value of ΔH is higher than TΔS.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
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
Formation of an ionic compound is a spontaneous reaction, for reaction to be spontaneous
ΔG=ΔHTΔS

free energy change enthalpy entropy

ΔG should be negative.

ΔS=ve as the formation of an ionic compound is more ordered state.

To make ΔG negative, ΔH must be more negative.

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