Toluene reacts with a halogen in the presence of iron (III) chloride giving ortho and para halo compounds. The reaction is
1. Electrophilic elimination reaction
2. Electrophilic substitution reaction
3. Free radical addition reaction
4. Nucleophilic substitution reaction
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyChlorobenzene is formed by the reaction of chlorine with benzene in the presence of . Which of the following species attacks the benzene ring in this reaction?
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe reaction of toluene with chlorine in the presence of iron and in the absence of light produces:
1. | |
2. | |
3. | |
4. | Mixture of 2 and 3 |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyArrange the compounds in increasing order of rate of reaction towards nucleophilic substitution reaction:
1. (i) < (ii) < (iii)
2. (i) < (iii) < (ii)
3. (iii) < (ii) < (i)
4. (ii) < (iii) < (i)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyArrange the compounds in increasing order of rate of reaction towards nucleophilic substitution.
1. (i) < (ii) < (iii)
2. (ii) < (i) < (iii)
3. (iii) < (ii) < (i)
4. (i) < (iii) < (ii)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the correct option based on statements below:
Assertion (A): | The presence of a nitro group at ortho or para position increases the reactivity of haloarenes towards nucleophilic substitution. |
Reason (R): | The nitro group, being an electron-withdrawing group, decreases the electron density over the benzene ring. |
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. | (A) is False but (R) is True. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the correct option based on statements below:
Assertion (A): | In monohaloarenes, further electrophilic substitution occurs at ortho and para positions. |
Reason (R): | The halogen atom is a ring deactivator. |
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. | (A) is False but (R) is True. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below are two statements:
Assertion (A): | It is difficult to replace chlorine by -OH in chlorobenzene in comparison to that in chloroethane. |
Reason (R): | Chlorine carbon (C—Cl) bond in chlorobenzene has a partial double bond character due to resonance. |
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. | (A) is False but (R) is True. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the correct option based on statements below:
Assertion (A): | Nitration of chlorobenzene leads to the formation of m-nitrochlorobenzene. |
Reason (R): | —NO2 group is an m-directing group. |
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. | (A) is False but (R) is True. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology