Alcohol, Phenol and Ether Test

Result

Alcohol, Phenol and Ether Test - 22

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
1 / -0

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

A
I < II < III < IV

B
IV < III < II < I

C
II < I < IV < III

D
Ill < IV < I < II

Solution

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.
Question 2
1 / -0

Which is the most appropriate reagent for the following oxidation reaction?
CH₃ —CH = CH — CH₂OH → CH₃ —CH =CH — COOH

A
KMnO₄/H₂SO₄

B
KMnO₄/NaOH

C
CrO₃/HCI/Pyridine

D
CrO₃/Acetone/H₂O

Solution

It is Jone's reagent which does not affect the olefinic bonds.
Question 3
1 / -0

What is the major product of the following reaction ?

A

B

C

D

Solution
Question 4
1 / -0

Which of the following is true statem ent regarding reaction of c/s and trans 2-hexene with CH₃OH/H⁺ ?

A
Both react at same rate

B
C/s isomer reacts faster than trans isomer

C
Both cis and trans isomers give mixture of positional isomers as the major product

D
Both (a) and (c)

Solution

Both cis and trans 2-hexene form s the same carbocation, hence react at same rate.
Question 5
1 / -0

The major product formed in the following reaction is

A

B

C

D

Solution
Question 6
1 / -0

The relative rate of reaction of the following with H₂SO₄

A
I > II > III

B
I > III > II

C
Il > l > III

D
II > III > I

Solution

Reaction proceeds via carbocation intermediates. Hence, greater the stability of carbocation, greater the reactivity.
Question 7
1 / -0

The major product in the following reaction is

A

B

C

D

Solution
Question 8
1 / -0

What is the major product of the following reaction?

A

B

C

D

Solution