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Subtopic: Â Mechanism of Reactions |
 69%
From NCERT
NEET - 2024
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Subtopic: Â Chemical Properties |
 66%
From NCERT
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: Â Chemical Properties |
 67%
From NCERT
NEET - 2024
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The most preferred method for the preparation of pure alkyl chlorides from alcohols is:
1. \(\mathrm{R}-\mathrm{OH}+\mathrm{HCl} \xrightarrow{\mathrm{ZnCl}_2} \mathrm{R}-\mathrm{Cl}+\mathrm{H}_2 \mathrm{O}\)
2. \(\mathrm{R}-\mathrm{OH}+\mathrm{PCl}_5 \rightarrow \mathrm{R}-\mathrm{Cl}+\mathrm{POCl}_3+\mathrm{HCl}\)
3. \(\mathrm{R}-\mathrm{OH}+\mathrm{SOCl}_2 \rightarrow \mathrm{R}-\mathrm{Cl}+\mathrm{SO}_2+\mathrm{HCl}\)
4. \(\mathrm{R}-\mathrm{OH}+\mathrm{PCl}_3 \rightarrow \mathrm{R}-\mathrm{Cl}+\mathrm{H}_3 \mathrm{PO}_3\)
1. \(\mathrm{R}-\mathrm{OH}+\mathrm{HCl} \xrightarrow{\mathrm{ZnCl}_2} \mathrm{R}-\mathrm{Cl}+\mathrm{H}_2 \mathrm{O}\)
2. \(\mathrm{R}-\mathrm{OH}+\mathrm{PCl}_5 \rightarrow \mathrm{R}-\mathrm{Cl}+\mathrm{POCl}_3+\mathrm{HCl}\)
3. \(\mathrm{R}-\mathrm{OH}+\mathrm{SOCl}_2 \rightarrow \mathrm{R}-\mathrm{Cl}+\mathrm{SO}_2+\mathrm{HCl}\)
4. \(\mathrm{R}-\mathrm{OH}+\mathrm{PCl}_3 \rightarrow \mathrm{R}-\mathrm{Cl}+\mathrm{H}_3 \mathrm{PO}_3\)
Subtopic: Â Introduction and Physical Properties |
 78%
From NCERT
NEET - 2024
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The following compound would be classified as:
| 1. | Vinylic halide | 2. | Benzylic halide |
| 3. | Aryl halide | 4. | Allylic halide |
Subtopic: Â Introduction and Physical Properties |
 67%
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: Â Chemical Properties |
 52%
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: Â Chemical Properties |
 73%
From NCERT
NEET - 2023
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Subtopic: Â Chemical Properties |
 56%
From NCERT
NEET - 2023
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Which of the following is suitable to synthesize chlorobenzene?
| 1. |  |
| 2. | Benzene, Cl2, anhydrous FeCl3 |
| 3. | Phenol, NaNO2, HCl, CuCl |
| 4. |  |
Subtopic: Â Haloarenes: Directive Influence of Halogen |
 69%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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Identify the statement that is incorrect regarding chirality:
| 1. | A racemic mixture shows zero optical rotation |
| 2. | SN1 reaction yields a 1:1 mixture of both enantiomers |
| 3. | The product obtained by SN2 reaction of haloalkane having chirality at the reactive site shows the inversion of configuration |
| 4. | Enantiomers are superimposable mirror images on each other |
Subtopic: Â Chemical Properties |
 75%
From NCERT
NEET - 2022
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