Question

Which of the following molecule contains 50% p\(_\pi\) character of hybrid orbital in C atom?

• A. Propene
• B. Acetylene
• C. Methane
• D. Ethane

Hint:

In molecules with sp hybridization like acetylene, the carbon atoms have 50% p\(_\pi\) character, while sp\(^2\) and sp\(^3\) hybridized carbons have different p orbital contributions.

Answer 1

The Correct Option is B

Step 1: Understanding p\(_\pi\) character.
In acetylene (C\(_2\)H\(_2\)), the carbon atoms undergo sp hybridization, where 50% of the orbital character comes from the p orbitals. This results in a 50% p\(_\pi\) character of the hybrid orbitals.

Step 2: Analyzing the options.
(A) Propene: Propene involves sp\(^2\) hybridization, but it does not exhibit 50% p\(_\pi\) character in its hybridization.
(B) Acetylene: This is the correct answer, as acetylene has a 50% p\(_\pi\) character in its sp hybrid orbitals.
(C) Methane: Methane involves sp\(^3\) hybridization, which has no p\(_\pi\) character.
(D) Ethane: Ethane also involves sp\(^3\) hybridization and does not exhibit p\(_\pi\) character.

Step 3: Conclusion.
The correct answer is (B) Acetylene, as it contains 50% p\(_\pi\) character of hybrid orbitals in carbon atoms.