Q.

In the following table, which one is correct ∆H       ∆S        Nature of reaction

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a

(-)    (+)       Spontaneous only at high temperature

b

(+)    (-)       Nonspontaneous regardless of temperature

c

(+)    (+)       Spontaneous only at low temperature

d

(-)    (-)       Spontaneous at all temperature

answer is B.

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Detailed Solution

∴   From ∆G=∆H-T∆S If ∆G<0; spontaneous If ∆G>0; Non-spontaneous If ∆G=0; equilibrium
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