Question

Which of the following organic compounds has same hybridisation as its combustion (CO$_2$) product?

• A. Ethane
• B. Ethyne
• C. Ethene
• D. Ethanol

Answer 1

Answer: (B)

Ethyne

Answer 2

Hybridisation of carbon = $sp^{3-number \, of \, \pi-bonds}$
In $CO_2 ,$ $_{ \, \, \, \, \, 1\pi \, \, \, \, \, 1\pi}^{(O = \, \, \, C \, = \, \, O)}$ hybridisation of carbon
\hspace50mm =sp^{3-2}=sp
In ethyne or acetylene , $C_2H_2 , (H - C ^ \equiv_{2\pi} C - H)$
hybridisation of carbon = $sp^{3-2}=sp$