Which of the following compounds contain all the carbon atoms in the same hybridisation state ?

Options

A. `H- C-= C -C -=C -H`
B. `CH_(3) - C -= C -CH_(3)`
C. `CH_(2) = C=CH_(2)`
D. `CH_(2) =CH-C -= CH`

Answer

A

Explanation

Key idea pi-bond do not participate in hybridisation
a. `H-overset(sp)(C)-=overset(sp)(C)-overset(sp)C-=overset(sp)(C)-H`
b. `overset(sp^(3))(CH_(3))-overset(sp)(C)-=overset(sp)(C)-overset(sp^(3))(CH_(3))`
c . `underset(sp^(2))CH_(2)=underset(sp)C=overset(sp^(2))(CH_(2))`
d. `underset(sp^(2))(CH_(2))=underset(sp^(2))(CH)-underset(sp)(C)-=underset(sp)(CH)`