Question

12. Which of the following is/are true about allene molecule, CH2=C=CH2?
1) The central carbon atom is sp hybridised
2) The terminal carbon atoms are sp2 hybridised
3) The planes containing the two CH, groups are perpendicular to each other
4) All are correct​

Answer 1

Answer:

(1) is correct

the central carbon is sp hybridised

Answer 2

Answer:

All are correct (4)

Explanation:

In the allene molecule, the central C atom is sp hybridized and other two C atoms are sp

2

hybridized.

Thus, the central C atom has two double bonds whereas other two C atoms have on double bond each.

There are two unhybridized p orbitals present on the central carbon atom which are mutually perpendicular. These two unhybridized p orbitals are used to form two pi bonds with two adjacent C atoms.

Hence, the planes containing the CH

2

groups are mutually perpendicular.

Thus, the statements A, B and C are correct.