IIT-JEE 2012 · Paper 1 · Chemistry Q21

ChemistrySingle correct+3 / -1Question 21 of 60

In allene $(\ce{C3H4})$ , the type(s) of hybridisation of the carbon atoms is (are)

sp

and

sp^3

sp

and

sp^2

only

sp^2

sp^2

and

sp^3

Answer and worked solution

Official answer: B

Allene is $\ce{H2C=C=CH2}$ .

The two terminal carbons each form one double bond and two C-H bonds: $sp^2$ .
The central carbon forms two double bonds (two σ, two π) with no other bonds: $sp$ .

(B)

Topics:Hybridisation

IIT-JEE 2012 · Paper 1, Chemistry question 21