The number of optical isomers of pent-3-en-2-ol is:

1. 2             

2. 4

3. 8             

4. 16

Subtopic:  Structural Isomers |
 59%
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The group named as benzal possesses .... nature.

(1) monovalent 

(2) bivalent

(3) trivalent

(4) tetravalent

Subtopic:  Nomenclature |
 56%
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Which of the following structures permits cis-trans isomerism?

1. X2C=CY2

2. XYC=CZ2

3. X2C=CXY

4. XYC=CXY

Subtopic:  Stereo Isomers |
 86%
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A compound contains 2 dissimilar asymmetric carbon atoms. The number of optically active isomers is

1. 2 

2. 3

3. 4

4. 5

Subtopic:  Stereo Isomers |
 80%
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The number of geometrical isomers in case of a compound with the structure,

CH3-CH=CH-CH=CH-C2H5 are:

1. Four                 

2. Three

3. Two                 

4. Five

Subtopic:  Stereo Isomers |
 74%
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Geometrical isomerism is caused by-

1. Restricted rotation around C=C bond.

2. The presence of one asymmetric carbon atom.

3. The different groups attached to the same functional group.

4. None of the above.

Subtopic:  Stereo Isomers |
 86%
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Which of the following is optically active?

(1) Alanine

(2) 2-butanol

(3) Lactic acid

(4) All of these

Subtopic:  Stereo Isomers |
 80%
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The isomerism which exists between CH3CHCl2, and CH2ClCH2Cl is:

1. Chain            

2. Functional

3. Position isomerism      

4. Metamerism

Subtopic:  Structural Isomers |
 86%
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Lactic acid is:

1. propionic acid

2. β-hydroxypropanoic acid

3. α-hydroxypropanoic acid

4. none of the above

Subtopic:  Nomenclature |
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On monochlorination of n-pentane, the number of structural isomers formed is:

(1) 4

(2) 3

(3) 2

(4) 1

 

Subtopic:  Structural Isomers |
 64%
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