Multiple Choice QuestionsFormation of 2-butene as major product by dehydration of 2-butanol is according to
Markownikoff rule
Saytzeff rule
Peroxide effect
Anti-Markownikoff rule
Ethane is formed by the reaction of methyl iodide and sodium metal in dry ether solution. This reaction is known as
Clemmensen's reduction
Kolbe's reaction
Wurtz reaction
Cannizaro's reaction
Which of the following does not contain chiral carbon atom?
Lactic acid
2-chlorobutanoic acid
Tartaric acid
Succinic acid
Base catalysed aldol condensation occurs with
benzaldehyde
2-methyl propionaldehyde
2, 2-dimethyl propionaldehyde
None of the above
B.
2-methyl propionaldehyde
Presence of α-H atom in carbonyl compounds is necessity for aldol condensation. Thus, 2-methyl propionaldehyde, due to the presence of α-H atom, gives base catalysed aldol condensation.
(CH3)2CHCHO + HC(CH3)2-CHO (CH3)2CHCH(OH)-C(CH3)2CHO
The boiling points of three isomeric pentanes 1, 2 and 3 are
(1) 9.5°C
(2) 28°C
(3) 36°C
1, 2 and 3 are respectively
n-pentane, iso-pentane, neo-pentane
iso-pentane, neo-pentane, n-pentane
n-pentane, neo-pentane, iso-pentane
neo-pentane, iso-pentane, n-pentane
Match List-I with List-II and select the correct answer from the given codes.
| List - I (Reaction) | List - II (Reagent/ Catalyst) |
| A. Cannizaro reaction | 1. SnCl2/ HCl |
| B. Stephen's reaction | 2. NaOH |
| C. Clemmensen reduction | 3. Zn/ Hg-conc. HCl |
| D. Rosenmund's reaction | 4. |
A - 1; B - 2; C - 3; D - 4
A - 2; B - 1; C - 3; D - 4
A - 4; B - 3; C - 2; D - 1
A - 1; B - 4; C - 2; D - 3
Haloalkane in the presence of alcoholic KOH undergoes
elimination
polymerisation
dimerisation
substitution
Grignard reagent is not prepared in aqueous medium but prepared in ether medium. Because
the reagent reacts with water
the reagent becomes inactive in water
it is insoluble in water
the reagent is highly reactive in water
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