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Geometrical isomerism and E/Z nomenclature

28 questions on Geometrical isomerism and E/Z nomenclature from the Stereoisomerism chapter: 6 NEET level, 11 JEE Main, 11 JEE Advanced. Each one opens with its answer and solution.

Practice this topic All Stereoisomerism topics

Which of the following alkenes can exist as a pair of geometrical (cis/trans) isomers? NEET level
In 1-chloroprop-1-ene, CH3-CH=CH-Cl, the Cl atom and the CH3 group lie on the same side of the double bond. What is the CIP descriptor of this isomer? NEET level
How many geometrical isomers does hexa-2,4-diene, CH3-CH=CH-CH=CH-CH3, have? NEET level
Which of the following shows syn/anti (geometrical) isomerism about the C=N bond? NEET level
In 1-bromo-2-chloroethene, Br-CH=CH-Cl, the Br and Cl atoms are on opposite sides of the double bond. The CIP descriptor of this isomer is NEET level
How many geometrical isomers (cis and trans forms) does 1,3-dimethylcyclobutane have? NEET level
In 2,3-dimethylhex-3-ene, (CH3)2CH-C(CH3)=CH-CH2CH3, the methyl group on C3 and the ethyl group on C4 lie on the same side of the double bond. What is its CIP d... JEE Main level
The isotopically labelled alkene CHD=CHCl has the deuterium atom and the chlorine atom on the same side of the double bond. Using CIP rules (higher atomic mass ... JEE Main level
Butan-2-one oxime, CH3CH2-C(CH3)=N-OH, is drawn with the OH group on the same side of the C=N bond as the ethyl group. Its CIP descriptor is JEE Main level
3-Ethylpenta-1,3-diene, CH2=CH-C(CH2CH3)=CH-CH3, is drawn with the methyl group on C4 and the ethyl group on C3 on the same side of the C3=C4 double bond. The d... JEE Main level
How many geometrical isomers does nona-2,4,6-triene, CH3-CH=CH-CH=CH-CH=CH-CH2CH3, have? JEE Main level
Which of the following compounds shows cis-trans (geometrical) isomerism? JEE Main level
How many stereoisomers does 1,2,3-trimethylcyclopropane have? Count enantiomers separately. JEE Main level
Assertion (A): 2-Methylbut-2-ene does not show geometrical isomerism. Reason (R): One of its doubly bonded carbons carries two identical groups. JEE Main level
Match each alkene in List I (geometry stated) with its CIP descriptor in List II. List I: (P) BrCH=CHCl with Br and Cl on the same side; (Q) CH3-CH=C(CH3)-CH2CH... JEE Main level
Which of the following can exist as a pair of stable geometrical isomers? (Treat C=N and N=N bonds as configurationally stable.) JEE Main level
Which of the following statements about the number of geometrical isomers is/are correct? JEE Main level
Hex-3-ene-2,5-diol, CH3-CH(OH)-CH=CH-CH(OH)-CH3, has two stereocentres and one stereogenic double bond. How many stereoisomers does it have in total (count all ... JEE Advanced level
3-Isopropylpenta-1,3-diene, CH2=CH-C(CH(CH3)2)=CH-CH3, is drawn with the methyl group on C4 and the isopropyl group on C3 on the same side of the C3=C4 bond. Ch... JEE Advanced level
The alkene CD3-C(CH2CH3)=CH-CH3 is drawn with the CD3 group and the CH3 on the other carbon on the same side of the double bond. Its CIP descriptor is JEE Advanced level
The oxime of tert-butyl phenyl ketone, (CH3)3C-C(C6H5)=N-OH, is drawn with the OH group on the same side of the C=N bond as the phenyl ring. Its CIP descriptor ... JEE Advanced level
How many stereoisomers does nona-2,3,5,7-tetraene, CH3-CH=C=CH-CH=CH-CH=CH-CH3, have? Count enantiomers separately. JEE Advanced level
Assertion (A): Hexa-2,3,4-triene, CH3-CH=C=C=CH-CH3, exists as cis and trans isomers, whereas penta-2,3-diene exists as a pair of enantiomers. Reason (R): The s... JEE Advanced level
How many stereoisomers does 1,2,3-trimethylcyclohexane have? Count enantiomers separately; the ring may be treated as planar for counting. JEE Advanced level
2-Methylhexa-2,4-dienoic acid is HOOC-C(CH3)=CH-CH=CH-CH3 (C1 is the carboxyl carbon). Which statements are correct? JEE Advanced level
Acetaldehyde azine, CH3-CH=N-N=CH-CH3, is a symmetrical molecule with two C=N bonds. Considering only the configurations of the two C=N bonds (ignore conformati... JEE Advanced level
The compound 5-chlorohex-3-en-2-ol, CH3-CH(OH)-CH=CH-CH(Cl)-CH3, is available as the (2R,3E,5S) isomer. How many of its stereoisomers are diastereomers of this ... JEE Advanced level
Four alkenes are described with the geometry stated. Which of them have the E configuration? JEE Advanced level