Class 12 Exam > Class 12 Questions > Only One Option Correct TypeDirection (O. Nos...
Start Learning for Free
Only One Option Correct Type
Direction (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q.
Arrange the following alcohols in the increasing order of reactivity with HBr.
I. benzyl alcohol
II. p-methyl benzyl alcohol
III. p-nitrobenzyl alcohol
IV. p-chlorobenzyl alcohol
I. benzyl alcohol
II. p-methyl benzyl alcohol
III. p-nitrobenzyl alcohol
IV. p-chlorobenzyl alcohol
- a)I < II < III < IV
- b)IV < III < II < I
- c)II < I < IV < III
- d)Ill < IV < I < II
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Only One Option Correct TypeDirection (O. Nos. 1-8) This section conta...
Reactive intermediate carbocation is involved, hence greater the stability of carbocation, greater the reactivity of corresponding alcohols. Methyl group gives electron donating + I-effect, increases stability of carbocation, nitro group and chloro have both - I-effect, decreases stability of carbocation. Nitro group has stronger electron withdrawing power than chloro, nitro derivative is further less reactive than chloro derivative.
Most Upvoted Answer
Only One Option Correct TypeDirection (O. Nos. 1-8) This section conta...
Answer:
To determine the increasing order of reactivity with HBr, we need to consider the stability of the carbocation intermediate formed during the reaction. The more stable the carbocation, the faster the reaction will proceed.
I. Benzyl alcohol:
Benzyl alcohol has a benzyl group attached to the alcohol functional group. The benzyl group is electron-donating, which stabilizes the positive charge on the carbocation intermediate. Therefore, benzyl alcohol will be the most reactive towards HBr.
II. p-Methyl benzyl alcohol:
p-Methyl benzyl alcohol also has a benzyl group attached to the alcohol functional group, but it also has a methyl group attached to the benzyl group. The methyl group is also electron-donating, providing additional stabilization to the carbocation intermediate. Therefore, p-methyl benzyl alcohol will be more reactive than benzyl alcohol.
III. p-Nitrobenzyl alcohol:
p-Nitrobenzyl alcohol has a nitro group attached to the benzyl group. The nitro group is electron-withdrawing, which destabilizes the carbocation intermediate. Therefore, p-nitrobenzyl alcohol will be less reactive than benzyl alcohol and p-methyl benzyl alcohol.
IV. p-Chlorobenzyl alcohol:
p-Chlorobenzyl alcohol has a chlorine atom attached to the benzyl group. The chlorine atom is also electron-withdrawing, but to a lesser extent than the nitro group. Therefore, p-chlorobenzyl alcohol will be less reactive than benzyl alcohol and p-methyl benzyl alcohol but more reactive than p-nitrobenzyl alcohol.
Therefore, the correct order of increasing reactivity with HBr is III (p-nitrobenzyl alcohol) < iv="" (p-chlorobenzyl="" alcohol)="" />< i="" (benzyl="" alcohol)="" />< ii="" (p-methyl="" benzyl="" alcohol).="" hence,="" the="" correct="" answer="" is="" option="" d:="" iii,="" iv,="" i,="" ii.="" ii="" (p-methyl="" benzyl="" alcohol).="" hence,="" the="" correct="" answer="" is="" option="" d:="" iii,="" iv,="" i,="" />
To determine the increasing order of reactivity with HBr, we need to consider the stability of the carbocation intermediate formed during the reaction. The more stable the carbocation, the faster the reaction will proceed.
I. Benzyl alcohol:
Benzyl alcohol has a benzyl group attached to the alcohol functional group. The benzyl group is electron-donating, which stabilizes the positive charge on the carbocation intermediate. Therefore, benzyl alcohol will be the most reactive towards HBr.
II. p-Methyl benzyl alcohol:
p-Methyl benzyl alcohol also has a benzyl group attached to the alcohol functional group, but it also has a methyl group attached to the benzyl group. The methyl group is also electron-donating, providing additional stabilization to the carbocation intermediate. Therefore, p-methyl benzyl alcohol will be more reactive than benzyl alcohol.
III. p-Nitrobenzyl alcohol:
p-Nitrobenzyl alcohol has a nitro group attached to the benzyl group. The nitro group is electron-withdrawing, which destabilizes the carbocation intermediate. Therefore, p-nitrobenzyl alcohol will be less reactive than benzyl alcohol and p-methyl benzyl alcohol.
IV. p-Chlorobenzyl alcohol:
p-Chlorobenzyl alcohol has a chlorine atom attached to the benzyl group. The chlorine atom is also electron-withdrawing, but to a lesser extent than the nitro group. Therefore, p-chlorobenzyl alcohol will be less reactive than benzyl alcohol and p-methyl benzyl alcohol but more reactive than p-nitrobenzyl alcohol.
Therefore, the correct order of increasing reactivity with HBr is III (p-nitrobenzyl alcohol) < iv="" (p-chlorobenzyl="" alcohol)="" />< i="" (benzyl="" alcohol)="" />< ii="" (p-methyl="" benzyl="" alcohol).="" hence,="" the="" correct="" answer="" is="" option="" d:="" iii,="" iv,="" i,="" ii.="" ii="" (p-methyl="" benzyl="" alcohol).="" hence,="" the="" correct="" answer="" is="" option="" d:="" iii,="" iv,="" i,="" />
|
Explore Courses for Class 12 exam
|
|
Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer?
Question Description
Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer?.
Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer?.
Solutions for Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Only One Option Correct TypeDirection (O. Nos. 1-8) This section contains 8 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.Q.Arrange the following alcohols in the increasing order of reactivity with HBr.I. benzyl alcoholII. p-methyl benzyl alcoholIII. p-nitrobenzyl alcoholIV. p-chlorobenzyl alcohola)I < II < III < IVb)IV < III < II < Ic)II < I < IV < IIId)Ill < IV < I < IICorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup