Question

C-h bond lenght of ch4 ,c2h4 ,c2h2 in increasing order

Answer 1

Answer:

Explanation:Greater the s character in hybridised orbitals, lesser will be the size of hybridised orbitals.

As a result greater is the overlapping by hybridised orbitals and greater is the bond energy as well as stability.

The order of hybridised orbitals are in the order given below:

                              sp       >           sp2    >         sp3

C – H bond energy and bond lengths in different overlapping

Molecule

C – H bond

Bond energy

Ethane

sp 3 - s

98.67 kcal/mol

Ethene

sp 2 - s

98.69 kcal/mol

Ethyne

sp  - s

102.38 kcal/mol