The number of structural isomers of C4H10 is
Correct answer: B. two
- A. one
- B. two
- C. three
- D. four
Explanation
Butane has an unbranched chain of four carbons and 2-methylpropane has a three carbon chain with a methyl branch, and no other arrangement is possible, so there are two. Pentane, C5H12, has three isomers, which is why three is offered here as a distractor. The number of isomers rises very steeply as the chain lengthens.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Isomerism
Isomerism occurs when compounds have the same molecular formula but different atom arrangements or spatial orientations. The content includes chain, position, functional, metameric and tautomeric isomerism, along with geometrical and optical isomerism, including cis-trans forms, E/Z notation, chirality and enantiomers.
Practise Fundamental Principles of Organic Chemistry
536 free Fundamental Principles of Organic Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Isomerism questions
A carbon atom that gives rise to optical isomerism must be attached to
Geometric or cis trans isomerism arises in an alkene because
Ethanol and dimethyl ether both have the molecular formula C2H6O. They are
Which pair of compounds are functional group isomers?
Which compound would show optical isomerism?
Aldehydes and ketones both, show the type of Isomerism is __________?