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Test: Epoxides - NEET MCQ


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22 Questions MCQ Test - Test: Epoxides

Test: Epoxides for NEET 2024 is part of NEET preparation. The Test: Epoxides questions and answers have been prepared according to the NEET exam syllabus.The Test: Epoxides MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Epoxides below.
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Test: Epoxides - Question 1

Only One Option Correct Type

Direction (Q. 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.

The most appropriate reagents that can bring about the following transformation is

Detailed Solution for Test: Epoxides - Question 1

Epoxide upon hydrolysis gives anti, vicinal diois.

Test: Epoxides - Question 2

Which major organic product is formed in the following reaction ?

Detailed Solution for Test: Epoxides - Question 2

Epoxide undergo nucleophilic attack of NH3 at less substituted α-carbon giving anti hydroxy amine.

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Test: Epoxides - Question 3

The major organic product formed in the reaction given below is

Detailed Solution for Test: Epoxides - Question 3

Test: Epoxides - Question 4

In the following hydrolysis reactio, the major final product is

Detailed Solution for Test: Epoxides - Question 4


On protonated epoxide, nucleophilic attack occur at α-carbon Where more stable carbocation could be formed.

Test: Epoxides - Question 5

In the reaction given below,

The correct deduction concerning X and Y is

Detailed Solution for Test: Epoxides - Question 5


Test: Epoxides - Question 6

An alkene on treatment with meta chloro perbenzoic acid undergoes epoxidation reaction to give oxirane. What is the correct order of increasing reactivity of the following in the above mentioned epoxidation reaction?

Detailed Solution for Test: Epoxides - Question 6

Epoxidation is an example of electrophilic ad dition at olefin ic bonds. Therefore, greater the electron density at olefinic bond, greater its reactivity. Electron donating groups increases reactivity while electron withdrawing group s like — CF3 decreases reactivity.

Test: Epoxides - Question 7

Which of the following compound gives more than one oxirane upon epoxidation with Ag2O/heat? 

Detailed Solution for Test: Epoxides - Question 7

It gives racemic mixture of oxiranes.

Test: Epoxides - Question 8

The reaction given beiow that gives oxirane as the major organic product is

Detailed Solution for Test: Epoxides - Question 8

*Multiple options can be correct
Test: Epoxides - Question 9

One or More than One Options Correct Type

Direction (Q, Nos. 9-14)This section contains 6 multiple type questions. Each question has 4 choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Consider the following reaction sequence,


Q. 

The intermediate products (I - IV) in the above reaction is/are

Detailed Solution for Test: Epoxides - Question 9


*Multiple options can be correct
Test: Epoxides - Question 10

The reagent that can bring about the following transformation in good yield is/are

Detailed Solution for Test: Epoxides - Question 10

(c) Epoxide on hydrolysis gives an ti diol.
(d) Halohydrin is formed in first step which gives epoxide with CaO. Epoxide is then hydrolysed in H2SO4 giving anti diol.

*Multiple options can be correct
Test: Epoxides - Question 11

In the reaction below,

The correct statement concerning the above reaction is/are

Detailed Solution for Test: Epoxides - Question 11


*Multiple options can be correct
Test: Epoxides - Question 12

Consider the reaction given below,

Detailed Solution for Test: Epoxides - Question 12

The m ajor product would be the only enantiom er form ed from a given enantiomer of starting compound.

*Multiple options can be correct
Test: Epoxides - Question 13

Consider the following reaction sequence,

I, II and III could be

Detailed Solution for Test: Epoxides - Question 13


*Multiple options can be correct
Test: Epoxides - Question 14

Consider the following reaction sequence,

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

Detailed Solution for Test: Epoxides - Question 14



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.

Test: Epoxides - Question 15

Comprehension Type

Direction (Q. Nos. 15-17) 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

Detailed Solution for Test: Epoxides - Question 15


Test: Epoxides - Question 16

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 H2SO4 a cyclic compound is formed which is

Detailed Solution for Test: Epoxides - Question 16


Test: Epoxides - Question 17

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 CH3MgBr followed by acid hydrolysis?

Detailed Solution for Test: Epoxides - Question 17

*Answer can only contain numeric values
Test: Epoxides - Question 18

One Integer Value Correct Type

Direction (Q. Nos. 18-22) 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 C3H6O ?


Detailed Solution for Test: Epoxides - Question 18

*Answer can only contain numeric values
Test: Epoxides - Question 19

Consider the reaction given below,

Q.

How many different triols isomers are formed?


Detailed Solution for Test: Epoxides - Question 19

*Answer can only contain numeric values
Test: Epoxides - Question 20

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


Detailed Solution for Test: Epoxides - Question 20


Oxidation number of both carbons of oxirane ring increases by one unit each.

*Answer can only contain numeric values
Test: Epoxides - Question 21

 In the following reaction,


Q. 

How many different stereoisomers of product formed ?


Detailed Solution for Test: Epoxides - Question 21


Each enantiomer of (I) will react with racemic mixture of (II) forming a pair of diastereomers.

*Answer can only contain numeric values
Test: Epoxides - Question 22

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


Detailed Solution for Test: Epoxides - Question 22

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