If enthalpy of dissociation of \( \mathrm{CH}_{4}(\mathrm{~g}) \) and \( \mathrm{C}_{2} \mathrm{....

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If enthalpy of dissociation of \( \mathrm{CH}_{4}(\mathrm{~g}) \) and \( \mathrm{C}_{2} \mathrm{H}_{6}(\mathrm{~g}) \)
\( \mathrm{P} \)
into gaseous atoms are 320 and 600 calories respectively then bond energy of \( \mathrm{C}-\mathrm{C} \) bond is :
(1) 80 cal
(2) \( 40 \mathrm{cal} \)
(3) \( 60 \mathrm{cal} \)
(4) \( 120 \mathrm{cal} \)


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