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What is the correct order of reactivity for the following compounds in an \(S_N 1\) reaction?
| 1. | II > I > III | 2. | III > II > I |
| 3. | I > II > III | 4. | I > III > II |
Subtopic: Â Chemical Properties |
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The increasing order of the boiling points of the major products A, B and C of the following reactions will be :
| (a). |  |
| (b). |  |
| (c). |  |
1. C < A < B
2. B < C < A
3. A < B < C
4. A < C < B
Subtopic: Â Introduction and Physical Properties |
 80%
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JEE
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The total number of monohalogenated organic products (excluded stereoisomer) in the following reaction is-
A (simplest optically active alkene) \(\xrightarrow[2. Cl_{2}/hv]{1. H_{2}/Ni}\) Products
1. 5
2. 4
3. 6
4. 8
A (simplest optically active alkene) \(\xrightarrow[2. Cl_{2}/hv]{1. H_{2}/Ni}\) Products
1. 5
2. 4
3. 6
4. 8
Subtopic: Â Chemical Properties |
 60%
From NCERT
JEE
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Given below are two statements:
| Assertion (A): | Vinyl halides do not undergo nucleophilic substitution easily. |
| Reason (R): | Even though the intermediate carbocation is stabilized by loosely held p-electrons, the cleavage is difficult because of strong bonding. |
Choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Â Chemical Properties |
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JEE
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Wurtz reaction is not preferred for the preparation of alkanes containing an odd number of carbon atoms because:
| 1. | Boiling points of alkanes obtained in the mixture are very close. |
| 2. | Melting points of alkanes obtained in the mixture are very close. |
| 3. | Lattice energy of alkanes obtained in the mixture are very close. |
| 4. | None of the above. |
Subtopic: Â Mechanism of Reactions |Â Chemical Properties |
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What is the substrate (A) in the following reaction?
| 1. | Bromobenzene | 2. | Benzylbromide |
| 3. | Acetophenone | 4. | Phenol |
Subtopic: Â Chemical Properties |
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JEE
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Subtopic: Â Chemical Properties |
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Synthesis of alkyl fluoride cannot be accomplished in good yield by heating alkyl chloride in the presence of:
1. \(Hg_2F_2\)
2. \(CoF_2\)
3. \(BF_3\)
4. \(SbF_3\)
1. \(Hg_2F_2\)
2. \(CoF_2\)
3. \(BF_3\)
4. \(SbF_3\)
Subtopic: Â Introduction and Physical Properties |
 77%
From NCERT
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The incorrect statement regarding CFCs is:
| 1. | These compounds are flammable and highly reactive. |
| 2. | These are non-toxic organic molecules. |
| 3. | They are used in refrigerators and air conditioners. |
| 4. | They are the transporting agents for continuously generating chlorine radicals in stratosphere. |
Subtopic: Â Dichloromethane, Trichloromethane & Tetrachloromethane |
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