(CH3)4N+ is neither an electrophile, nor a nucleophile because it:

1. does not have electron pair for donation as well as cannot attract electron pair

2. neither has electron pair available for donation nor can accommodate electron since all shells of N are fully occupied.

3. can act as Lewis acid and base

4. none of the above

Subtopic:  Nucleophile & Electrophile |
 76%
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The most unlikely representation of resonance structures of p-nitrophenoxide ion is:

1. 

2. 

3. 

4. 

Subtopic:  Electron Displacement Effects |
 57%
From NCERT
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Which of the following is an electrophilic reagent?

1. RO-

2. BF3

3. NH3

4. ROH

Subtopic:  Nucleophile & Electrophile |
 77%
From NCERT
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The +I (inductive effect) is shown by:

1. -CH3

2. -OH

3. -F

4. -C6H5

Subtopic:  Electron Displacement Effects |
 86%
From NCERT
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The-I effect is shown by:

1. -COOH

2. -CH3

3. -CH3CH2

4. -CHR2

Subtopic:  Electron Displacement Effects |
 89%
From NCERT
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Which of the following is singlet carbene?

1. (CH3)3C+

2. C2H5-CH

3. CH3CH2CH2-

4. CH=CH-CH2+

Subtopic:  Reaction Intermediates ; Preparation & Properties |
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The increasing order of +ve I-effect shown by H, CH3, C2H5 and C3H7 is-

1. H < CH3 < C2H5 < C3H7

2. H> CH3 <C2H5 > C3H7

3. H < C2H5 < CH3 <C3H7

4. None of the above

Subtopic:  Electron Displacement Effects |
 82%
From NCERT
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To which ring size cycloalkanes, Baeyer’s strain theory is not valid?

(1) 3 carbon

(2) 4 carbon

(3) 5 carbon

(4) ≥6 carbon

Subtopic:  Hybridisation & Structure of Carbon Compounds |
 68%
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Shifting of electrons of a multiple bonds under the influence of a reagent is called:

(1) I-effect

(2) E-effect

(3) M-effect

(4) T-effect

Subtopic:  Electron Displacement Effects |
From NCERT
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The correct statement among the following is -

1. Allyl carbocation (CH2=CH-CH2+) is more stable than propyl carbocation

2. Propyl carbocation is more stable than allyl carbocation

3. Both are equally stable

4. None of the above

Subtopic:  Reaction Intermediates ; Preparation & Properties |
 68%
From NCERT
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