Q. No.Consider the reaction
CH3 CH2 CH2 Br + NaCN - CH3 CH2 CH2 CN + NaBr
This reaction will be the fastest in
1. Ethanol
2. Methanol
3. N, N'-dimethylformamide (DMF)
4. water
CH3 CH2 CH2 Br + NaCN - CH3 CH2 CH2 CN + NaBr
This reaction will be the fastest in
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| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
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Which of the following is the halogen exchange reaction?
| 1. | R X + NaI \(\xrightarrow{\text{ Acetone }}\) RI + NaX |
| 2. |  |
| 3. | R - OH + HX \(\xrightarrow{\text{ ZnCl}_2~~}\) R - X + H2O |
| 4. |  |
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Which of the carbon atoms present in the molecule given below are asymmetric?
1. a, b, c, d
2. b, c
3. a, d
4. a, b, c
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Match the items of Column I and Column II.
Column I Column II
(i) reaction (a) vic-dibromides
(ii) Chemicals in fire extinguisher (b) gem-dihalides
(iii) Bromination of alkenes (c) Racemisation
(iv) Alkylidene halides (d) Saytzeff rule
(v) Elimination of HX from alkylhalide (e) Chlorobromocarbons
1. (i) → (e) (ii) → (c) (iii) → (b) (iv) → (a) (v) → (d)
2. (i) → (c) (ii) → (e) (iii) → (a) (iv) → (b) (v) → (d)
3. (i) → (e) (ii) → (d) (iii) → (b) (iv) → (a) (v) → (c)
4. (i) → (b) (ii) → (d) (iii) → (a) (iv) → (c) (v) → (e)
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Match the reactions given in Column I with the types of reactions given in Column II.
|
Column I |
Column II |
||
|
(i) |
|
(a) |
Nucleophilic aromatic substitution |
|
(ii) |
|
(b) |
Electrophilic aromatic substitution |
|
(iii) |
|
(c) |
Saytzeff elimination |
|
(iv) |
|
(d) |
Electrophilic addition |
|
(v) |
 |
(e) |
Nucleophilic substitution () |
1 (i) → (a) (ii) → (d) (iii) → (c) (iv) → (b) (v) → (e)
2. (i) → (b) (ii) → (e) (iii) → (c) (iv) → (d) (v) → (c)
3. (i) → (a) (ii) → (c) (iii) → (e) (iv) → (b) (v) → (d)
4. (i) → (b) (ii) → (d) (iii) → (e) (iv) → (a) (v) → (c)
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The compound A on treatment with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A, B and C are in the order of:
1.
2.
3.
4.
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