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Test: Preparation of Alcohols - NEET MCQ


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22 Questions MCQ Test - Test: Preparation of Alcohols

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Test: Preparation of Alcohols - Question 1

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, 

Which of the following pairs of compounds can be used as starting material in the synthesis of 2-phenyl-2-pentanol?

Detailed Solution for Test: Preparation of Alcohols - Question 1

Test: Preparation of Alcohols - Question 2

What is the product of the reaction of methyl cyclohexene with B2H6 in THF followed by the oxidation with alkaline H2O2?

 

Detailed Solution for Test: Preparation of Alcohols - Question 2

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Test: Preparation of Alcohols - Question 3

Choose the reagent and reactant that would produce 2-methyl-2-butanol as the major product.



Detailed Solution for Test: Preparation of Alcohols - Question 3


Test: Preparation of Alcohols - Question 4

Ethanol is converted into ethoxy ethane,

Detailed Solution for Test: Preparation of Alcohols - Question 4

In order to obtain ethoxy ethane from ethanol, the ethanol must be subjected to the effect of concentrated sulphuric acid at 413 Kelvin or 140°C as shown below:

Test: Preparation of Alcohols - Question 5

What is the correct structure for the major compound produced by the following reaction sequence?

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Reaction involves rearrangement of carbocation

Test: Preparation of Alcohols - Question 6

In the reaction given below,

The final major organic product is

Detailed Solution for Test: Preparation of Alcohols - Question 6

It is an oxo process of synthesis of alcohols.

Test: Preparation of Alcohols - Question 7

Primary alcohol can easily be prepared from primary alkyl halide via SN2 reaction with aqueous NaOH. However, similar method does not work for the preparation of tertiary alcohol. Which reaction can be used for the efficient preparation of tertiary alcohol {tertiary butanol) from tertiary butyl bromide?

Detailed Solution for Test: Preparation of Alcohols - Question 7

Test: Preparation of Alcohols - Question 8

What is the major product in the following reaction?

Detailed Solution for Test: Preparation of Alcohols - Question 8

In oxymercuration-demercuration reaction, Markownikoff's addition of H2O takes place with HO- added to carbon where more stable carbocation could be formed.

*Multiple options can be correct
Test: Preparation of Alcohols - Question 9

Direction (Q. Nos. 9-15) This section contains 7 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

In the following reaction,

The possible substitution product(s) is/are

Detailed Solution for Test: Preparation of Alcohols - Question 9

It is a SN1 reaction.

(I) and (II) undergo nucleophilic attack by H2O giving the desired products.
 

*Multiple options can be correct
Test: Preparation of Alcohols - Question 10

In the following reaction,

Possible product(s) is/are 

Detailed Solution for Test: Preparation of Alcohols - Question 10

 Oxo proces

The aldehydes formed above undergo reduction to give the desired products.

*Multiple options can be correct
Test: Preparation of Alcohols - Question 11

Which of the following Grignard’s synthesis can result into 2-cyclopentyl-2-butanol?

Detailed Solution for Test: Preparation of Alcohols - Question 11

Option (b) does not give 2-cyclopentyl-2-butanol as

*Multiple options can be correct
Test: Preparation of Alcohols - Question 12

Aliphatic alcohol when treated with dilute H2SO4, undergo isomerisation via reversible reaction. In the following reaction, which of the isomers are expected to be present at equilibrium?

Detailed Solution for Test: Preparation of Alcohols - Question 12

Isomerisation occur via carbocation intermediates.


The above carbocations upon nucleophilic attack by water gives the desired product.  

*Multiple options can be correct
Test: Preparation of Alcohols - Question 13

In the following reaction,

The alcohol(s) formed in significant yield is/are

Detailed Solution for Test: Preparation of Alcohols - Question 13


 

*Multiple options can be correct
Test: Preparation of Alcohols - Question 14

In the reaction given below,

The correct statement regarding the outcome of the above reaction is/are

Detailed Solution for Test: Preparation of Alcohols - Question 14

Deutride (D-) addition at planar carbonyl carbon occur from both side of plane, with equal probability giving racemic mixture of alcohols. Also deuterium is attached to carbonyl carbon atom only.

*Multiple options can be correct
Test: Preparation of Alcohols - Question 15

Consider the following reaction,

Possible product(s) is/are

Detailed Solution for Test: Preparation of Alcohols - Question 15

Reaction proceed via carbocation intermediates.


Test: Preparation of Alcohols - Question 16

Comprehension Type

Direction (Q. Nos. 16-18) This section contains a paragraph, describing theory, experiments, data, etc.
Three questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).

Passage

Consider the following sequence of reaction,

Q. 

The structure of compound B is

Detailed Solution for Test: Preparation of Alcohols - Question 16

B is an alcohol formed by the attack of Grignard's reagent on acetone. Hence, alcohol must have the skeleton


Also, R is C7H11 with two degree of unsaturation it must be cyclohexenyl methyl not cyclohexyl methyl.

Test: Preparation of Alcohols - Question 17

Consider the following sequence of reaction,

Q. 

Detailed Solution for Test: Preparation of Alcohols - Question 17

Hydroboration oxidation at double bond gives anti-Markownikoff’s addition of H2O in syn orientation.
 

Test: Preparation of Alcohols - Question 18

Consider the following sequence of reaction,

Q. 

If C is treated with excess of Br2(l) how many different isomers of bromination product(s) result?

Detailed Solution for Test: Preparation of Alcohols - Question 18

*Answer can only contain numeric values
Test: Preparation of Alcohols - Question 19

One Integer Value Correct Type

Direction (Q. Nos. 19-22) This section contains 4 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

In the following reaction,

Q.

How many different diols are formed as a result of nucleophilic addition reaction?


Detailed Solution for Test: Preparation of Alcohols - Question 19

*Answer can only contain numeric values
Test: Preparation of Alcohols - Question 20

In the reaction given below,

How many different products are expected?


Detailed Solution for Test: Preparation of Alcohols - Question 20

https://cn.edurev.in/ApplicationImages/Temp/787b3574-10b0-44d6-a02e-e93e760210ab_lg.jpg

https://cn.edurev.in/ApplicationImages/Temp/485050_79556e25-c5f3-4f5d-aba0-3240bccfb573_lg.PNG

https://cn.edurev.in/ApplicationImages/Temp/485050_7b2a5afb-01dc-4b7d-8040-a21fa1e917e3_lg.PNG

Hence 5 is the correct answer.

*Answer can only contain numeric values
Test: Preparation of Alcohols - Question 21

If 3, 3-dimethyl-2, 4-pentanedione is treated with a Grignard reagent consisting of mixture of CH3MgBr and C2H5MgBr and finally hydrolysing product with dilute H2SO4 results in the formation of how many different diols?


Detailed Solution for Test: Preparation of Alcohols - Question 21


(II) has two chiral carbon but symmetrical, hence, three stereoisomers.
(III) has only one chiral carbon hence, two stereoisomers (pair of enantiomers).

*Answer can only contain numeric values
Test: Preparation of Alcohols - Question 22

If a pure enantiomer of 3-methyl-1-pentene is treated with boiling solution of dilute H2SO4, how many different alcohols are expected in principle?


Detailed Solution for Test: Preparation of Alcohols - Question 22

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