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Enthalpy

The C - C bon...

Question

The C - C bond length is shortest in:

C_{2} H_{6}

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C_{2} H_{2}

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C_{6} H_{6}

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C_{2} H_{4}

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Solution

The correct option is A $C_{2} H_{2}$
As no. of bond increases between C and C, bond length decreases. In alkyne there is triple bond between C. Thus it has shortest bond length.

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C_{2} H_{4}

C_{2} H_{2}

C_{6} H_{6}

C_{2} H_{6}

C - H

I \to C_{2} H_{2},

I I \to C_{2} H_{4},

I I I \to C_{2} H_{6}

C H

C_{2} H_{6}, C_{2} H_{4}

C_{2} H_{2}

List - A	List - B
(Molecule)	(Pure and hybrid orbitals involved)
A) $C_{2} H_{6}$	1) 12, 18
B) $C_{2} H_{4}$	2) 6, 4
C) $C_{2} H_{2}$	3) 6, 6
D) $C_{6} H_{6}$	4) 6, 8

C

C H_{4}, C_{2} H_{6}, C_{3} H_{8}, C_{2} H_{4}, C_{2} H_{2}, H_{2} C_{2} O_{4}

C O_{2}

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