Which compound would show optical isomerism?
Correct answer: B. CH3CHClCH2CH3
- A. CH3CH2OH
- B. CH3CHClCH2CH3
- C. CH3CH2CH3
- D. CH2Cl2
Explanation
In CH3CHClCH2CH3 the second carbon carries a methyl group, a chlorine, a hydrogen and an ethyl group, four different substituents, so it is chiral and the molecule exists as two non superimposable mirror images. In every other option at least two of the four groups on each carbon are identical. Checking each carbon for four different groups is the whole test.
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
Which pair of compounds are functional group isomers?
The number of structural isomers of C4H10 is
A carbon atom that gives rise to optical isomerism must be attached to
Aldehydes and ketones both, show the type of Isomerism is __________?
How many isomeric aldoses are possible for the molecular formula C6H12O6?
Ethers show functional group isomerism with __________________?