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Q. No.Which of the following is the most preferred method for preparing pure alkyl chlorides from alcohols?
1. \(\mathrm{{R}-{OH}+{HCl} \xrightarrow{{ZnCl}_2} {R}-{Cl}+{H}_2 {O}}\)
2. \(\mathrm{{R}-{OH}+{PCl}_5 → {R}-{Cl}+{POCl}_3+{HCl}}\)
3. \(\mathrm{{R}-{OH}+{SOCl}_2 → {R}-{Cl}+{SO}_2+{HCl}}\)
4. \(\mathrm{{R}-{OH}+{PCl}_3 → {R}-{Cl}+{H}_3 {PO}_3}\)
Subtopic: Introduction and Physical Properties |
86%
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NEET - 2024
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\(\text{CCl}_2\text{F}_2\)is one of the most common haloalkanes used in industries. The reaction through which it is manufactured from tetrachloromethane is called:
1. Finkelstein reaction
2. Sandmeyer's reaction
3. Swarts reaction
4. Wurtz-Fittig reaction
1. Finkelstein reaction
2. Sandmeyer's reaction
3. Swarts reaction
4. Wurtz-Fittig reaction
Subtopic: Chemical Properties |
80%
From NCERT
NEET - 2024
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The products A and B obtained in the following reactions, respectively, are:
\( \begin{aligned} & 3 \mathrm{ROH}+\mathrm{PCl}_3 \rightarrow 3 \mathrm{RCl}+\mathrm{A} \\ & \mathrm{ROH}+\mathrm{PCl}_5 \rightarrow \mathrm{RCl}+\mathrm{HCl}+\mathrm{B} \end{aligned} \)
1. \(\mathrm{POCl}_3~ and~ \mathrm{H}_3 \mathrm{PO}_4 \)
2. \(\mathrm{H}_3 \mathrm{PO}_4~ and ~\mathrm{POCl}_3 \)
3. \(\mathrm{H}_3 \mathrm{PO}_3~and ~\mathrm{POCl}_3 \)
4. \(\mathrm{POCl}_3~and ~\mathrm{H}_3 \mathrm{PO}_3\)
\( \begin{aligned} & 3 \mathrm{ROH}+\mathrm{PCl}_3 \rightarrow 3 \mathrm{RCl}+\mathrm{A} \\ & \mathrm{ROH}+\mathrm{PCl}_5 \rightarrow \mathrm{RCl}+\mathrm{HCl}+\mathrm{B} \end{aligned} \)
1. \(\mathrm{POCl}_3~ and~ \mathrm{H}_3 \mathrm{PO}_4 \)
2. \(\mathrm{H}_3 \mathrm{PO}_4~ and ~\mathrm{POCl}_3 \)
3. \(\mathrm{H}_3 \mathrm{PO}_3~and ~\mathrm{POCl}_3 \)
4. \(\mathrm{POCl}_3~and ~\mathrm{H}_3 \mathrm{PO}_3\)
Subtopic: Chemical Properties |
70%
From NCERT
NEET - 2024
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Subtopic: Chemical Properties |
69%
From NCERT
NEET - 2024
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Subtopic: Mechanism of Reactions |
72%
From NCERT
NEET - 2024
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Subtopic: Chemical Properties |
58%
From NCERT
NEET - 2023
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A reaction among the following can generate isonitriles as a major product.
A. \(R-X + HCN \rightarrow \)
B. \(R-X + AgCN \rightarrow \)
C. \(R-X + KCN \rightarrow \)
D. \(R-X + NaCN \xrightarrow [C_2H_5OH] {H_2O} \)
Choose the most appropriate answer from the options given below:
A. \(R-X + HCN \rightarrow \)
B. \(R-X + AgCN \rightarrow \)
C. \(R-X + KCN \rightarrow \)
D. \(R-X + NaCN \xrightarrow [C_2H_5OH] {H_2O} \)
Choose the most appropriate answer from the options given below:
| 1. | (D) only | 2. | (C) and (D) only |
| 3. | (B) only | 4. | (A) and (B) only |
Subtopic: Chemical Properties |
76%
From NCERT
NEET - 2023
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The correct order for the rate of \(\alpha\) , \(\beta\)-dehydrohalogenation for the following compounds is:
(i)  |
(ii)  |
(iii)  |
| 1. | (i) < (ii) < (iii) | 2. | (ii) < (i) < (iii) |
| 3. | (iii) < (ii) < (i) | 4. | (ii) < (iii) < (i) |
Subtopic: Chemical Properties |
55%
From NCERT
NEET - 2023
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The following compound would be classified as:
| 1. | Vinylic halide | 2. | Benzylic halide |
| 3. | Aryl halide | 4. | Allylic halide |
Subtopic: Introduction and Physical Properties |
69%
From NCERT
NEET - 2023
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Which of the following methods is incorrect for the synthesis of alkenes?
1. Treatment of alkynes with Na in liquid NH3
2. Heating alkyl halides with alcoholic KOH
3. Treating alkyl halides in aqueous KOH solution
4. Treating vicinal dihalides with Zn metal
1. Treatment of alkynes with Na in liquid NH3
2. Heating alkyl halides with alcoholic KOH
3. Treating alkyl halides in aqueous KOH solution
4. Treating vicinal dihalides with Zn metal
Subtopic: Chemical Properties |
78%
From NCERT
NEET - 2022
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