MolSynapsequestion bank

MolSynapse / Question bank / IUPAC Nomenclature and Structural Isomerism / Counting structural isomers

JEE Main levelSingle correct optionDifficulty 2 of 3nm186

How many open-chain alkenes (structural isomers only) are there with the formula $C X_{5} H X_{10}$ ?

A3
B5
C4
D6

Answer: B

Pent-1-ene, pent-2-ene, 2-methylbut-1-ene, 3-methylbut-1-ene and 2-methylbut-2-ene: 5 (cis/trans of pent-2-ene not counted).

Practice IUPAC Nomenclature and Structural Isomerism More on Counting structural isomers

Previous questionNext question

More questions on Counting structural isomers

Ethers of formula C5H12O (open-chain, structural isomers) number JEE Main level
How many secondary alcohols are there among the open-chain saturated alcohols of molecular formula C5H12O? JEE Main level
Tertiary alcohols of formula C6H14O (structural isomers, open chain) number JEE Main level
The number of alkyne isomers (open-chain, structural) of C5H8 is JEE Main level
Counting every ring system that contains only carbon atoms, ring-substituted or not, the number of cycloalkane structural isomers of C5H10 (... JEE Main level
The number of primary amines (structural isomers) of formula C4H11N is JEE Main level