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Q.

A chemical reaction cannot occur at all if its :

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a

ΔH is(+)ve and ΔS is(-)ve 

b

ΔH is(-)ve and ΔS is(+)ve 

c

ΔH and ΔS are (+)ve but ΔH<TΔS

d

ΔH and ΔS are () ve but ΔH>TΔS

answer is A.

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Detailed Solution

G=H-TS

When H=+ve;and S=-ve,under these conditions G=+ve and reaction is non -spontaneous in the given direction

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