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Standard entropies of X(2), Y(2) and XY(...

Standard entropies of `X_(2), Y_(2) and XY_(3)` are 60, 40 and `"50 JK"^(-1)" mol"^(-1)` resepectively. For the reaction
`(1)/(2)X_(2)+(3)/(2)Y_(2)harr XY_(3), DeltaH=-"30 kJ"` to be at equilibrium, the temperature should be

A

750 K

B

1000 K

C

1250 K

D

500 K

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The correct Answer is:
A
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