A. Methane
A.
B. Propane
B.
C. Ethene
C.
D. Butane
D.
Correct Answer: C
সঠিক উত্তর: C
Explanation
ব্যাখ্যা
An unsaturated hydrocarbon contains at least one double or triple bond between carbon atoms. These include:
Alkenes: with at least one C=C double bond (general formula: CₙH₂ₙ)
Alkynes: with at least one C≡C triple bond (general formula: CₙH₂ₙ₋₂)