In each of the following groups, which is the strongest (best) nucleophile ?
(I)(1)H3C-O- (2) (3)H3C-S- in CH3OH
(II)(1)OH- (2) H2O (3) in DMF
(III) (1) (2) (3) CH3O- in DMSO
(a) I,3; II,3; III,2 (b) I,2; II,1; III,3
(c) I,1; II,2; III,1 (d) I,3; II,1; III,3
(A) on heating isomerizes to (B). What is the structure of (B) ?
Which of the following statements is true?
(1) CH3CH2S- is both a stronger base and more nucleophilic than CH3CH2O-
(2) CH3CH2S- is a stronger base but is less nucleophilic than CH3CH2O-
(3) CH3CH2S- is a weaker base but is more nucleophilic than CH3CH2O-
(4) CH3CH2S- is both a weaker base and less nucleophilic than CH3CH2O-
The labeled -O18 will be:
1. H2O
2. Methyl benzoate
3. Both 1 and 2
4. Benzoic acid
Product (A) in the below mentioned reaction is:
1. | 2. |
3. | 4. |
The compound that is most prone to oxidation is-
1. | CH3-CHOH-CH3 | 2. | |
3. | CH3-CH2-O-CH2-CH3 | 4. |
Which of the following react with HBr at faster rate?
1. | \(\mathrm{NaBH}_4 \) | 2. | \(\mathrm{LiAlH}_4 \) |
3. | \(PCC \) | 4. | \(\mathrm{KMnO}_4\) |
1. | 2. | ||
3. | 4. |