The-I effect is shown by:

1. -COOH

2. -CH3

3. -CH3CH2

4. -CHR2

Subtopic:  Electron Displacement Effects |
 90%
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Sulphur trioxide is:

1. an electrophile              2. a nucleophile

3. a homolytic agent          4. a base

Subtopic:  Nucleophile & Electrophile |
 61%
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Allyl isocyanide has:

1. 9σ and \(4\pi\) bonds.

2. 8σ and \(5\pi\) bonds.

3. 9σ, \(3\pi\) and 2 non-bonded electrons.

4. 8σ, \(3\pi\) and 4 non-bonded electrons.

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 73%
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The least stable resonance structure among the following is:

 

Subtopic:  Reaction Intermediates ; Preparation & Properties |
 55%
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Hyperconjugation involves overlap of the following orbitals:

(1) σ - σ

(2) σ - p

(3) p - p

(4) π - π

Subtopic:  Electron Displacement Effects |
 61%
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Buta-1,3-diene and But-2-yne are:

1. position isomers

2. functional isomers

3. chain isomers

4. tautomers

Subtopic:  Structural Isomers |
 77%
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In the following carbocations, the most stabile carbocation:

(1)  RCH2C+H3         (2) 

 

(3)                  (4) 

Subtopic:  Reaction Intermediates ; Preparation & Properties |
 87%
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The number of optical isomers of pent-3-en-2-ol is:

1. 2             
2. 4
3. 8             
4. 16

Subtopic:  Structural Isomers |
 62%
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Geometrical isomerism is caused:

1. by restricted rotation around C=C bond

2. by the presence of one asymmetric carbon atom

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

4. by swing of hydrogen atom between two polyvalent atoms.

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 |
 87%
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