Question

How hybridization of ‘C’ atom changes when ethene is hydrogenated?

Answer 1

We know that

Ethane is $sp^{3}$ hybridized.

Ethene is $sp^{2}$ hybridized.

Ethyne is $sp^{}$ hybridized.

Number of hybrid orbitals formed is equal to the number of combining orbitals

Carbon makes four bonds in ethane so it requires 4 hybrid orbitals. One s-orbital and 3 p-orbitals constitutes for bonding to form sp3 hybridization.

In case ethene, carbon makes three bonds so it requires 3 orbitals which constitutes to form sp2 hybridization.

Similarly, in case of ethyne they form sp hybridized orbitals

Answer 2

Carbon makes four bonds in ethane so it requires 4 hybrid orbitals. One s-orbital and 3 p-orbitals constitutes for bonding to form sp3 hybridization. In case ethene, carbon makes three bonds so it requires 3 orbitals which constitutes to form sp2 hybridization.