Among the following four structures (I to IV), which of the following statement(s) is /are true?

All of these have only one chiral carbon except fourth.

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II is a optically active.

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Only I, II and III are chiral while IV are achiral.

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Only IV is chiral and remaining have one chiral carbon.

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Solution

The correct options are
A All of these have only one chiral carbon except fourth.
B II is a optically active.
C Only I, II and III are chiral while IV are achiral.
Structure IV does not have any chiral carbon but I, II, III have one chiral carbon each. So, except IV, remaining are chiral.

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Similar questions

Q. Consider the following two compounds. These compounds are stereoisomers of 1, 2, 3-trimethylcyclohexane. One of these compounds has three chirality centers, while the other compound has only two chirality centers. Identify which compound has only two chirality centers and explain why.

Which of the following statements is correct regarding the chirality (optical isomerism) of the cis and trans isomers of the type $M (a a)_{2} b_{2}$ (M stands for a metal, a and b are achiral ligands and aa is a bidentate ligand) ?

Q. An organic compound having a carbon attached to four different groups is optically active. But, is the opposite also true? That is, do all optically active organic compounds have chiral carbons? Not necessarily. Presence or absence of chiral centre is not the sufficient criterion for optical activity. The ultimate criterion is the presence or absence of either plane or centre of symmetry. Two compounds which are non-superimposable mirror images of each other are called enantiomers. If a compound contains more than one chiral carbon, new words are required to describe the relationship between various stereoisomers of the compounds. Those words are diastereomers and mesomers.

Optically active compounds among the following is :

Q. An organic compound having a carbon attached to four different groups is optically active. But, is the opposite also true? That is, do all optically active organic compounds have chiral carbons? Not necessarily. Presence or absence of chiral center is not the sufficient criterion for optical activity. The ultimate criterion is presence or absence of either plane or center of symmetry. Two compounds which are non-superimposable mirror images of each other are called enantiomers. If a compound contains more than one chiral carbon, new words are required to describe the relationship between various stereoisomers of the compounds. Those words are diastereomers and mesomers.
Optically active compounds among the following is/are
(A)

C H_{3} - C H = C = C H_{2}

(B)

C H_{3} - C H = C = C H - C H_{3}

Q. Question 3
Which of the following statements are correct?
(i) Sound is produced by vibrations.
(ii) Sound requires a medium for propagation.
(iii) Light and sound both require a medium for propagation.
(iv) Sound travels slower than light.

(a) i, ii and iv only
(b) i and ii only
(c) i, ii and iii only
(d) ii, iii and iv only

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Among the following four structures (I to IV), which of the following statement(s) is /are true?

The correct options are A All of these have only one chiral carbon except fourth. B II is a optically active. C Only I, II and III are chiral while IV are achiral.Structure IV does not have any chiral carbon but I, II, III have one chiral carbon each. So, except IV, remaining are chiral.

The correct options are
A All of these have only one chiral carbon except fourth.
B II is a optically active.
C Only I, II and III are chiral while IV are achiral.
Structure IV does not have any chiral carbon but I, II, III have one chiral carbon each. So, except IV, remaining are chiral.