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Q.

α-D glucose undergoes mutarotation to β-D glucose in an aqueous solution at 298 K. If 64% of conversion observed after some time to attain equilibrium, then the reaction quotient and spontanity of reaction is

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a

0.56, non-spontaneous

b

1.78, non spontaneous

c

0.56, spontaneous

d

1.78, spontaneous

answer is C.

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Detailed Solution

α-Dglucoseβ-Dglucose

 reaction quotient (Q)=[β-Dglucose][α-Dglucose]

=6436 =1.777

ΔG0=-2.303RTlog(Q)

=-1.014 kJ.mol-1

 As ΔG° value is negative, reaction is spontaneous 

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