Question

In which molecule aii the carbon atoms have same type of hybridisation?
(A) ethyne
(B) propene
(C) prop-1-yne
(D) but-2-ene

Answer 1

Answer:

No one

Explanation:

Ethyne = sp, sp

Propene = sp3, sp3, sp2

Propyne = sp3, sp, sp

But2ene= sp3, sp2, sp2, sp3

Answer 2

In (A) ethyne molecule all the carbon atoms have same type of hybridisation.

Explanation:

• The functional formula of ethyne is $H-C \equiv C-H$.  
• It is a linear molecule.
• The two carbon in ethyne use 2sp orbital to form 2 sigma bonds. It has no lone pair of electrons.  
• After hybridization, each carbon atom forms $2p_x$ and $2p_y$ orbitals. The orbitals are used to form the sigma bonding and sigma anti-bonding molecular orbitals.