Question

A hydrocarbon of molecular formula $C_5{H}_{10}$ could be a:

• A. monosubstituted alkene
• B. disubstituted alkene
• C. trisubstituted alkene
• D. tetrasubstituted alkene

Answer 1

Answer: (A), (B), (C)

monosubstituted alkene
disubstituted alkene
trisubstituted alkene

Compound with molecular formula $C_5{H}_{10}$ may be:
1. Cyclopentane
2. 1,2-dimethylcyclopropane
3. 2-methyl-2-butane
3. methylcyclobutane
5. pentene
With reference to alkenes the possibilities are:
As there are 5 carbon atoms so, monosubstituted alkene, disubstituted alkene, and trisubstituted alkene are possible.
Tetrasubstituted alkene is not possible as there have to be at least 2 carbon atoms in the $C=C$ chain which leaves only 3 carbon atoms. Thus, maximum of 3 substitutions are allowed.