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The dissociation energy of CH(4) and C(2...

The dissociation energy of `CH_(4)` and `C_(2)H_(6)` are respectively `360` and `620 kcal//mol.` The bond energy of `C-C` bond is `:`

A

`260kcal//mol`

B

`180kcal//mol`

C

`130kcal//mol`

D

`80kcal//mol`

Text Solution

Verified by Experts

The correct Answer is:
D
`CH_(4) rarr C+4H,DeltaH=360kcal`
`e_(C-H)=90kcal`
`C_(2)H_(6)rarr2C+6H,DeltaH=620`
`:. 620=e_(C-C)+6e_(C-H)`
`:. E_(C-C)=620-540=80kcal.`
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