Fructose reduces Tollen's reagent due to
asymmetric carbons
primary alcoholic group
secondary alcoholic group
enolisation of fructose followed by conversion to aldehyde by base
The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds
III > II > I
II > I > III
I > III > II
I > II > III
D.
I > II > III
Since alkyl group has +I-effect and aryl group has +R-effect, thus greater the number of alkyl and aryl groups attached to the carbonyl group, its reactivity towards nucleophilic addition reaction. Secondly, as the steric crowding on carbonyl group increases, the reactivity decreases accordingly.
Therefor,correct reactivity order for reaction with PhMgBr is
Match the compounds given in List I with List II and select the suitable option using the codes given below.
List I | List II | ||
A. | Benzaldehyde | 1. | Phenolphthalein |
B. | Phthalic anhydride | 2. | Benzoin condensation |
C. | Phenyl benzoate | 3. | Oil of wintergreen |
D. | Methyl salicylate | 4. | Fries rearrangement |
A B C D
4 1 3 2
A B C D
4 2 3 1
A B C D
2 3 4 1
A B C D
2 1 4 3
An alkene having molecular formula C8H12 on ozonolysis yields glyoxal and 2, 2-dimethyl butane-l, 4-dial. The structure of alkene is