Phenols and Ethers Test

Result

Phenols and Ethers Test - 8

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Weekly Quiz Competition

Question 1
1 / -0.25

Consider the reaction given below,

A
The major product is

B
The major product is

C
The product would be a single enantiomer

D
Option B,C are Correct

Solution

The m ajor product would be the only enantiom er form ed from a given enantiomer of starting compound.
Question 2
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Consider the following reaction sequence,

I, II and III could be

A

B

C

D
All are correct

Solution
Question 3
1 / -0.25

Consider the following reaction sequence,

The correct statem ent regarding X, Y and Z is/are

A
X is a racemic mixture

B
X is a pure enantiomer

C
Y and Z are diastereomers

D
Option B,C are Correct

Solution

Since, a pure enantiomer of oxirane is taken, a pure enantiomer of X would be produced. Y and Z are diastereomers as they are not enantiomers but stereoisomers.
Question 4
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Comprehension Type

Direction : This section contains a passage describing theory, experiments, data, etc. Two questions related to the paragraph have been given. Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d).

Passage

Oxirane is a reactive ether, undergo nucleophilic attack at a-carbon in the presence of both acidic and basic medium. The generalised mechanism in the two medium are :

I. Acidic medium

II. Basic medium

As shown above, in acidic medium, nucleophilic attack occur at more substituted α-carbon while in basic medium, nucleophilic attack occur preferably at less substituted α-carbon.

Q.

In the reaction given below, th e final major organic product Y is

A

B

C

D

Solution
Question 5
1 / -0.25

Oxirane is a reactive ether, undergo nucleophilic attack at a-carbon in the presence of both acidic and basic medium. The generalised mechanism in the two medium are :

I. Acidic medium

II. Basic medium

As shown above, in acidic medium, nucleophilic attack occur at more substituted α-carbon while in basic medium, nucleophilic attack occur preferably at less substituted α-carbon.

Q.

If X is heated with concentrated H₂ SO₄ a cyclic compound is formed which is

A

B

C

D

Solution
Question 6
1 / -0.25

Oxirane is a reactive ether, undergo nucleophilic attack at a-carbon in the presence of both acidic and basic medium. The generalised mechanism in the two medium are :

I. Acidic medium

II. Basic medium

As shown above, in acidic medium, nucleophilic attack occur at more substituted α-carbon while in basic medium, nucleophilic attack occur preferably at less substituted α-carbon.

Q.

What would be formed if 2-phenyloxirane is treated with CH₃ MgBr followed by acid hydrolysis?

A

B

C

D

Solution
Question 7
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One Integer Value Correct Type

Direction : This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

Q.

How many different ether isomers are possible for C₃ H₆ O ?

A
4

B
3

C
2

D
1

Solution
Question 8
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Consider the reaction given below,

Q.

How many different triols isomers are formed?

A
1

B
3

C
5

D
9

Solution
Question 9
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If propene undergoes oxidation to methyl oxirane, what is the net change in oxidation number of carbon atoms?

A
0

B
9

C
2

D
5

Solution

Oxidation number of both carbons of oxirane ring increases by one unit each.
Question 10
1 / -0.25

In the following reaction,

Q.

How many different stereoisomers of product formed ?

A
0

B
9

C
8

D
4

Solution

Each enantiomer of (I) will react with racemic mixture of (II) forming a pair of diastereomers.
Question 11
1 / -0.25

How many different arene oxide would be formed on mono epoxidation of phenanthrene?

A
3

B
1

C
0

D
9

Solution