MCQ practice · SSC Chemistry Board questions · Chapter 11: Mineral Resources: Fossils
What is the valency of an alkyl group?
Think it through first, then pick an option.
- a 1
- b 2
- c 3
- d 4
Answer and explanation
Correct answer: a 1
An alkyl group forms by removing just one H from an alkane, so it is monovalent: valency 1.
Why the other options are wrong
- b 2: Valency 2 would need two H removed; the alkyl group is monovalent.
- c 3: Not 3; one H is removed, so the alkyl group has valency 1.
- d 4: 4 is the valency of a carbon atom; an alkyl group's valency is 1.
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