alleryWhich of the following is an unsaturated hydrocarbon?
AMethane (CH4)
BPropane (C3H8)
CEthene (C2H4)
DButane (C4H10)
Answer & Solution
Correct answer: C. Ethene (C2H4)
1. Saturated hydrocarbons have only C-C single bonds.
2. Methane, propane and butane are alkanes (CnH(2n+2)).
3. Ethene has a C=C double bond (C2H4) and follows CnH(2n).
4. So ethene is the unsaturated hydrocarbon here.
5. The double bond makes it more chemically reactive than alkanes.
_Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_
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