(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
The most unlikely representation of resonance structures of p-nitrophenoxide ion is:
1.
2.
3.
4.
Which of the following is an electrophilic reagent?
1. RO-
2. BF3
3. NH3
4. ROH
The +I (inductive effect) is shown by:
1. -CH3
2. -OH
3. -F
4. -C6H5
The-I effect is shown by:
1. -COOH
2. -CH3
3. -CH3CH2
4. -CHR2
Which of the following is singlet carbene?
1. (CH3)3C+
2. C2H5-CH
3.
4. CH2 =CH-
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
To which ring size cycloalkanes, Baeyer’s strain theory is not valid?
(1) 3 carbon
(2) 4 carbon
(3) 5 carbon
(4) ≥6 carbon
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
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