318249
Match the following recatants in Column I with the corresponding reaction products in Column II and choose the correct option from the codes given below.
1 \({\text{A - S, B - R, C - Q, D - P}}\)
2 \({\text{A - S, B - R, C - P, D - Q}}\)
3 \({\text{A - R, B - Q, C - P, D - Q}}\)
4 \({\text{A - R, B - S, C - Q, D - P}}\)
Explanation:
(A) Halogenation, B) Methylation reaction, (C) Friedel-craft acylation reaction, (D) Sulphonation, So, the option (1) is correct
CHXI13:HYDROCARBONS
318250
Assertion : Benzene on heating with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason : Sulphonation is a reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulphonation of benzene is an electrophilic substitution reaction in which \(\mathrm{SO}_{3}\) acts as the electrophile. So, option (1) is correct.
CHXI13:HYDROCARBONS
318251
The conversion can be effected using:
1 \(\mathrm{Br}_{2} / \mathrm{CCl}_{4}\)
2 \(\mathrm{Br}_{2} / \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Br}_{2} / \mathrm{Fe}\)
4 \(\mathrm{Br}_{2}\) / benzoyl peroxide
Explanation:
\(\mathrm{Br}_{2} / \mathrm{Fe}\) is the reagent for bromination on benzene (electrophilic aromatic substitution).
CHXI13:HYDROCARBONS
318252
For preparing monoalkyl benzene, acylation process is preferred than direct alkylation because
1 In alkylation, a poisonous gas is evolved
2 In alkylation, large amount of heat is evolved
3 In alkylation, polyalkylated product is formed
4 Alkylation is very costly
Explanation:
For preparing monoalkylbenzene, acylation route is preferred rather than direct alkylation. This is because of the fact that during alkylation, alkyl group is introduced, which being ring activating group, accelerates further alkylation to form di-, tri- and tetra- poly alkylated product. On the other hand, during acylation we get acylbenzene (e.g. acetylbenzene); acyl group, being deactivating group does not allow further acylation easily. Hence the reaction stops at the monoacyl stage which then can be reduced to alkyl benzene easily.
CHXI13:HYDROCARBONS
318253
Assertion : Benzene reacts with \({\text{n}}\)-propyl chloride in presence of \(\mathrm{AlCl}_{3}\) to give isopropyl benzene. Reason : Benzene undergoes electrophilic substitution readily.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Even though benzene has \(3 \pi\) bonds, it is readily undergoes electrophilic substitution reaction. When Friedel Crafts alkylation is carried out with \(\mathrm{CH}_{3} \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}\), the product is isopropyl benzene because the initially formed n-propyl carbocation being less stable first rearranges to the more stable isopropyl carbocation by a 1,2-hydride shift before attacking the benzene ring. So, option (2) is correct.
318249
Match the following recatants in Column I with the corresponding reaction products in Column II and choose the correct option from the codes given below.
1 \({\text{A - S, B - R, C - Q, D - P}}\)
2 \({\text{A - S, B - R, C - P, D - Q}}\)
3 \({\text{A - R, B - Q, C - P, D - Q}}\)
4 \({\text{A - R, B - S, C - Q, D - P}}\)
Explanation:
(A) Halogenation, B) Methylation reaction, (C) Friedel-craft acylation reaction, (D) Sulphonation, So, the option (1) is correct
CHXI13:HYDROCARBONS
318250
Assertion : Benzene on heating with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason : Sulphonation is a reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulphonation of benzene is an electrophilic substitution reaction in which \(\mathrm{SO}_{3}\) acts as the electrophile. So, option (1) is correct.
CHXI13:HYDROCARBONS
318251
The conversion can be effected using:
1 \(\mathrm{Br}_{2} / \mathrm{CCl}_{4}\)
2 \(\mathrm{Br}_{2} / \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Br}_{2} / \mathrm{Fe}\)
4 \(\mathrm{Br}_{2}\) / benzoyl peroxide
Explanation:
\(\mathrm{Br}_{2} / \mathrm{Fe}\) is the reagent for bromination on benzene (electrophilic aromatic substitution).
CHXI13:HYDROCARBONS
318252
For preparing monoalkyl benzene, acylation process is preferred than direct alkylation because
1 In alkylation, a poisonous gas is evolved
2 In alkylation, large amount of heat is evolved
3 In alkylation, polyalkylated product is formed
4 Alkylation is very costly
Explanation:
For preparing monoalkylbenzene, acylation route is preferred rather than direct alkylation. This is because of the fact that during alkylation, alkyl group is introduced, which being ring activating group, accelerates further alkylation to form di-, tri- and tetra- poly alkylated product. On the other hand, during acylation we get acylbenzene (e.g. acetylbenzene); acyl group, being deactivating group does not allow further acylation easily. Hence the reaction stops at the monoacyl stage which then can be reduced to alkyl benzene easily.
CHXI13:HYDROCARBONS
318253
Assertion : Benzene reacts with \({\text{n}}\)-propyl chloride in presence of \(\mathrm{AlCl}_{3}\) to give isopropyl benzene. Reason : Benzene undergoes electrophilic substitution readily.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Even though benzene has \(3 \pi\) bonds, it is readily undergoes electrophilic substitution reaction. When Friedel Crafts alkylation is carried out with \(\mathrm{CH}_{3} \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}\), the product is isopropyl benzene because the initially formed n-propyl carbocation being less stable first rearranges to the more stable isopropyl carbocation by a 1,2-hydride shift before attacking the benzene ring. So, option (2) is correct.
318249
Match the following recatants in Column I with the corresponding reaction products in Column II and choose the correct option from the codes given below.
1 \({\text{A - S, B - R, C - Q, D - P}}\)
2 \({\text{A - S, B - R, C - P, D - Q}}\)
3 \({\text{A - R, B - Q, C - P, D - Q}}\)
4 \({\text{A - R, B - S, C - Q, D - P}}\)
Explanation:
(A) Halogenation, B) Methylation reaction, (C) Friedel-craft acylation reaction, (D) Sulphonation, So, the option (1) is correct
CHXI13:HYDROCARBONS
318250
Assertion : Benzene on heating with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason : Sulphonation is a reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulphonation of benzene is an electrophilic substitution reaction in which \(\mathrm{SO}_{3}\) acts as the electrophile. So, option (1) is correct.
CHXI13:HYDROCARBONS
318251
The conversion can be effected using:
1 \(\mathrm{Br}_{2} / \mathrm{CCl}_{4}\)
2 \(\mathrm{Br}_{2} / \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Br}_{2} / \mathrm{Fe}\)
4 \(\mathrm{Br}_{2}\) / benzoyl peroxide
Explanation:
\(\mathrm{Br}_{2} / \mathrm{Fe}\) is the reagent for bromination on benzene (electrophilic aromatic substitution).
CHXI13:HYDROCARBONS
318252
For preparing monoalkyl benzene, acylation process is preferred than direct alkylation because
1 In alkylation, a poisonous gas is evolved
2 In alkylation, large amount of heat is evolved
3 In alkylation, polyalkylated product is formed
4 Alkylation is very costly
Explanation:
For preparing monoalkylbenzene, acylation route is preferred rather than direct alkylation. This is because of the fact that during alkylation, alkyl group is introduced, which being ring activating group, accelerates further alkylation to form di-, tri- and tetra- poly alkylated product. On the other hand, during acylation we get acylbenzene (e.g. acetylbenzene); acyl group, being deactivating group does not allow further acylation easily. Hence the reaction stops at the monoacyl stage which then can be reduced to alkyl benzene easily.
CHXI13:HYDROCARBONS
318253
Assertion : Benzene reacts with \({\text{n}}\)-propyl chloride in presence of \(\mathrm{AlCl}_{3}\) to give isopropyl benzene. Reason : Benzene undergoes electrophilic substitution readily.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Even though benzene has \(3 \pi\) bonds, it is readily undergoes electrophilic substitution reaction. When Friedel Crafts alkylation is carried out with \(\mathrm{CH}_{3} \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}\), the product is isopropyl benzene because the initially formed n-propyl carbocation being less stable first rearranges to the more stable isopropyl carbocation by a 1,2-hydride shift before attacking the benzene ring. So, option (2) is correct.
318249
Match the following recatants in Column I with the corresponding reaction products in Column II and choose the correct option from the codes given below.
1 \({\text{A - S, B - R, C - Q, D - P}}\)
2 \({\text{A - S, B - R, C - P, D - Q}}\)
3 \({\text{A - R, B - Q, C - P, D - Q}}\)
4 \({\text{A - R, B - S, C - Q, D - P}}\)
Explanation:
(A) Halogenation, B) Methylation reaction, (C) Friedel-craft acylation reaction, (D) Sulphonation, So, the option (1) is correct
CHXI13:HYDROCARBONS
318250
Assertion : Benzene on heating with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason : Sulphonation is a reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulphonation of benzene is an electrophilic substitution reaction in which \(\mathrm{SO}_{3}\) acts as the electrophile. So, option (1) is correct.
CHXI13:HYDROCARBONS
318251
The conversion can be effected using:
1 \(\mathrm{Br}_{2} / \mathrm{CCl}_{4}\)
2 \(\mathrm{Br}_{2} / \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Br}_{2} / \mathrm{Fe}\)
4 \(\mathrm{Br}_{2}\) / benzoyl peroxide
Explanation:
\(\mathrm{Br}_{2} / \mathrm{Fe}\) is the reagent for bromination on benzene (electrophilic aromatic substitution).
CHXI13:HYDROCARBONS
318252
For preparing monoalkyl benzene, acylation process is preferred than direct alkylation because
1 In alkylation, a poisonous gas is evolved
2 In alkylation, large amount of heat is evolved
3 In alkylation, polyalkylated product is formed
4 Alkylation is very costly
Explanation:
For preparing monoalkylbenzene, acylation route is preferred rather than direct alkylation. This is because of the fact that during alkylation, alkyl group is introduced, which being ring activating group, accelerates further alkylation to form di-, tri- and tetra- poly alkylated product. On the other hand, during acylation we get acylbenzene (e.g. acetylbenzene); acyl group, being deactivating group does not allow further acylation easily. Hence the reaction stops at the monoacyl stage which then can be reduced to alkyl benzene easily.
CHXI13:HYDROCARBONS
318253
Assertion : Benzene reacts with \({\text{n}}\)-propyl chloride in presence of \(\mathrm{AlCl}_{3}\) to give isopropyl benzene. Reason : Benzene undergoes electrophilic substitution readily.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Even though benzene has \(3 \pi\) bonds, it is readily undergoes electrophilic substitution reaction. When Friedel Crafts alkylation is carried out with \(\mathrm{CH}_{3} \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}\), the product is isopropyl benzene because the initially formed n-propyl carbocation being less stable first rearranges to the more stable isopropyl carbocation by a 1,2-hydride shift before attacking the benzene ring. So, option (2) is correct.
318249
Match the following recatants in Column I with the corresponding reaction products in Column II and choose the correct option from the codes given below.
1 \({\text{A - S, B - R, C - Q, D - P}}\)
2 \({\text{A - S, B - R, C - P, D - Q}}\)
3 \({\text{A - R, B - Q, C - P, D - Q}}\)
4 \({\text{A - R, B - S, C - Q, D - P}}\)
Explanation:
(A) Halogenation, B) Methylation reaction, (C) Friedel-craft acylation reaction, (D) Sulphonation, So, the option (1) is correct
CHXI13:HYDROCARBONS
318250
Assertion : Benzene on heating with conc. \(\mathrm{H}_{2} \mathrm{SO}_{4}\) gives benzenesulphonic acid which when heated with superheated steam under pressure gives benzene. Reason : Sulphonation is a reversible process.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulphonation of benzene is an electrophilic substitution reaction in which \(\mathrm{SO}_{3}\) acts as the electrophile. So, option (1) is correct.
CHXI13:HYDROCARBONS
318251
The conversion can be effected using:
1 \(\mathrm{Br}_{2} / \mathrm{CCl}_{4}\)
2 \(\mathrm{Br}_{2} / \mathrm{H}_{2} \mathrm{O}\)
3 \(\mathrm{Br}_{2} / \mathrm{Fe}\)
4 \(\mathrm{Br}_{2}\) / benzoyl peroxide
Explanation:
\(\mathrm{Br}_{2} / \mathrm{Fe}\) is the reagent for bromination on benzene (electrophilic aromatic substitution).
CHXI13:HYDROCARBONS
318252
For preparing monoalkyl benzene, acylation process is preferred than direct alkylation because
1 In alkylation, a poisonous gas is evolved
2 In alkylation, large amount of heat is evolved
3 In alkylation, polyalkylated product is formed
4 Alkylation is very costly
Explanation:
For preparing monoalkylbenzene, acylation route is preferred rather than direct alkylation. This is because of the fact that during alkylation, alkyl group is introduced, which being ring activating group, accelerates further alkylation to form di-, tri- and tetra- poly alkylated product. On the other hand, during acylation we get acylbenzene (e.g. acetylbenzene); acyl group, being deactivating group does not allow further acylation easily. Hence the reaction stops at the monoacyl stage which then can be reduced to alkyl benzene easily.
CHXI13:HYDROCARBONS
318253
Assertion : Benzene reacts with \({\text{n}}\)-propyl chloride in presence of \(\mathrm{AlCl}_{3}\) to give isopropyl benzene. Reason : Benzene undergoes electrophilic substitution readily.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Even though benzene has \(3 \pi\) bonds, it is readily undergoes electrophilic substitution reaction. When Friedel Crafts alkylation is carried out with \(\mathrm{CH}_{3} \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}\), the product is isopropyl benzene because the initially formed n-propyl carbocation being less stable first rearranges to the more stable isopropyl carbocation by a 1,2-hydride shift before attacking the benzene ring. So, option (2) is correct.
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