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From the following bond energies : H- H bond energy : 431.37 ~kJ ~mol^-1 C= C bond energy : 606.10 ~kJ ~mol^-1 C- C bond energy : 336.49 ~kJ ~mol^-1…

NEET UG 2009 — Chemistry Physical Chemistry

2009mcqhard

From the following bond energies : H−H\mathrm{H}-\mathrm{H}H−H bond energy : 431.37 kJ mol−1431.37 \mathrm{~kJ} \mathrm{~mol}^{-1}431.37 kJ mol−1 C=C\mathrm{C}=\mathrm{C}C=C bond energy : 606.10 kJ mol−1606.10 \mathrm{~kJ} \mathrm{~mol}^{-1}606.10 kJ mol−1 C−C\mathrm{C}-\mathrm{C}C−C bond energy : 336.49 kJ mol−1336.49 \mathrm{~kJ} \mathrm{~mol}^{-1}336.49 kJ mol−1 C−H\mathrm{C}-\mathrm{H}C−H bond energy : 410.50 kJ mol−1410.50 \mathrm{~kJ} \mathrm{~mol}^{-1}410.50 kJ mol−1 Enthalpy for the reaction, NEET 2009 Chemistry, Thermodynamics (C) — question figure

will be :

Official previous-year question

Held on 30 Apr 2009 · Verified 9 Jul 2026.

Options

  1. A

    553.0 kJ mol−1553.0 \mathrm{~kJ} \mathrm{~mol}^{-1}553.0 kJ mol−1

  2. B

    1523.6 kJ mol−11523.6 \mathrm{~kJ} \mathrm{~mol}^{-1}1523.6 kJ mol−1

  3. C

    −243.6 kJ mol−1-243.6 \mathrm{~kJ} \mathrm{~mol}^{-1}−243.6 kJ mol−1

  4. D

    −120.0 kJ mol−1-120.0 \mathrm{~kJ} \mathrm{~mol}^{-1}−120.0 kJ mol−1

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