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The enthalpies of formation of C2H2(g) a...

The enthalpies of formation of `C_2H_2(g)` and `C_6H_6(g)` at 298 K are 230 and 85 kJ/mol respectively. The enthalpy change for the reaction `3C_2H_2(g) to C_6H_6(g)` is

A

605 kJ/mol

B

865 kJ/mol

C

-605 kJ/mol

D

-865 kJ/mol

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The correct Answer is:
C
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