Q. No.
Which one of the following is correctly matched?
| 1. |  |
E2 reaction |
| 2. |  |
E2 reaction |
| 3. | CH3CH2CH2OH | E1 reaction |
| 4. |  |
E1cb reaction |
Which one of the following pairs is correctly matched?
(1) E1cb reaction, Hofmann elimination
(2) Hofmann rule, most substituted alkene
(3) Saytzeff rule, least substituted alkene
(4) E1 reaction, Hofmann elimination
Arrange the reactivity of alcohols in decreasing order for E1 elimination reaction:
(i)
(ii)
(iii)
(iv)
Select the correct answer from the codes given below:
Codes:
1. (iii), (ii), (iv), (i)
2. (ii), (iii), (iv), (i)
3. (ii), (iii), (i), (iv)
4. (iii), (ii), (i), (iv)
Consider the following statements :
(i) Pyrolytic elimination is always syn elimination.
(ii) In pyrolytic elimination, product formation takes place by most stable eclipsed conformation.
(iii) In pyrolytic elimination, product formation takes place by Hofmann rule.
(iv) In pyrrolytic elimination, product formation takes place by Saytzeff rule.
Of these statements :
(1) (i), (ii) and (iv) are correct
(2) (i), (ii) and (iii) are correct
(3) (i) and (ii) are correct
(4) (ii) and (iii) are correct
Dichloromethane on treatment with alc. KOH/ gives:
(1) Carbene
(2) Diclorocarbene
(3) Singlet chlorocarbene
(4) Triplet chlorocarbene
Reaction intermediate of E1cb reaction is:
1. Carbocation
2. Carbanion
3. benzyne
4. free radical
Reaction intermediate of E1 reaction is:
(1) Carbocation
(2) carbanion
(3) Carbene
(4) free radical
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