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NEET 2018, Chemistry Q38: Hess’s Law and Bond Energy

NEET2018Paper 2018Chemistry
Q.

The bond dissociation energies of X2, Y2 and XY are in the ratio of 1 : 0.5 : 1. ΔH for the formation of XY is –200 kJ mol–1. The bond dissociation energy of X2will be

  1. A

    200 kJ mol–1     

  2. B

    800 kJ mol–1     

  3. C

    100 kJ mol–1

  4. D

    400 kJ mol–1

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