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Question

The hybridization present in CH4,C2H6,and C2H4 are respectively:

A
sp3, sp2, sp2
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B
sp2, sp2, sp2
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C
sp3, sp3, sp2
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D
sp3, sp2, sp
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Solution

The correct option is C sp3, sp3, sp2
Let's take a look at the electronic configuration of carbon:

Now, in case of CH4


Four sp3 hybrid orbitals are formed,

Which will combine with four hydrogen atoms Hybridization sp3 [One s-orbital Three p-orbitals]

Now, in case of C2H6
It is two CH3 bonded together.
What is the bond between two carbon atoms?
Let’s take a look.


Four sp3 hybrid orbitals are formed.

One sp3 hybrid orbital will combine with sp3 hybrid orbital of other carbon. (σ bond)
Three sp3 hybrid orbitals will combine with three hydrogen for each carbon Hybridization sp3 [ one s-orbital, three p-orbitals]

Now, in case of C2H4

Three sp2 hybrid orbitals are formed.
In this case, what is the bond between two carbon atoms??
Let's take a look:

Three sp2 hybrid orbitals are formed.

One orbital containing one electron will form π bond with the other carbon atom.
Three sp2 orbitals will form σ bonds with hydrogen and σ bond with the other carbon.
Therefore, there will be two bonds between two carbons (one σ and one π)
Hybridization sp2 [one s-orbital, two p-orbitals]

CH4



C2H6


C2H2

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