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$- C^{1} - C_{1}^{1} -$ bond length and bond energy in alkanes are

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a

1.54 $A ° \ 140 KCal {Mol}^{- 1}$

b

1.54 $A ° \ 80 KCal {Mol}^{- 1}$

c

1.54 $A ° \ 200 KCal {Mol}^{- 1}$

d

1.34 $A ° \ 80 KCal {Mol}^{- 1}$

answer is D.

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Detailed Solution

In alkane, the hybridisation of all carbon atoms is ${sp}^{3}$ .
${sp}^{3}$ hybridisation is the mixer of one 2s – orbital and three 2P- orbitals to create four hybrid orbitals with similar characteristics.
The C-C bond length is 1.54 $\overset{o}{A}$ and C-C bond angle is 80 $KCal {Mol}^{- 1}$ .

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