Revisal Problems (Past 13 Year) JEE Main (Aliphatic Aldehydes And Ketones)


30 Questions MCQ Test Chemistry for JEE Advanced | Revisal Problems (Past 13 Year) JEE Main (Aliphatic Aldehydes And Ketones)


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This mock test of Revisal Problems (Past 13 Year) JEE Main (Aliphatic Aldehydes And Ketones) for JEE helps you for every JEE entrance exam. This contains 30 Multiple Choice Questions for JEE Revisal Problems (Past 13 Year) JEE Main (Aliphatic Aldehydes And Ketones) (mcq) to study with solutions a complete question bank. The solved questions answers in this Revisal Problems (Past 13 Year) JEE Main (Aliphatic Aldehydes And Ketones) quiz give you a good mix of easy questions and tough questions. JEE students definitely take this Revisal Problems (Past 13 Year) JEE Main (Aliphatic Aldehydes And Ketones) exercise for a better result in the exam. You can find other Revisal Problems (Past 13 Year) JEE Main (Aliphatic Aldehydes And Ketones) extra questions, long questions & short questions for JEE on EduRev as well by searching above.
QUESTION: 1

Only One Option Correct Type

Direction (Q. Nos. 1-30) This section contains 30 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

Q. 

What is the IUPAC name of the following compound?

Solution:

Phenyl group is a locant on the parent chain containing aldehyde as principal functional group.

QUESTION: 2

What is the major organic product obtained from the following reaction?

Solution:


QUESTION: 3

What is the major organic product obtained from the following reaction?

Solution:

QUESTION: 4

What is the major organic product obtained from the following reaction ?

Solution:

Wittig reaction

QUESTION: 5

Which ketone-diol undergoes cyclisation to form the following acetal?




Solution:


QUESTION: 6

What is the major organic product obtained from the following reaction?

Solution:

Six membered cyclic hemiacetal is formed.

QUESTION: 7

What is the major organic product obtained from the following reaction?

Solution:

In the presence of rhodium, only olefinic bond is reduced.

QUESTION: 8

What is the major organic product obtained from the following sequence of reaction?




Solution:


QUESTION: 9

What is the major organic product obtained from the following sequence of reaction?




Solution:


QUESTION: 10

Which of the following has the highest Keq for enolisation?

 


Solution:

QUESTION: 11

Which of the following is the best description of the mechanism of the reaction between a ketone and an amine to form an imine?

Solution:

QUESTION: 12

Which of the following statement is not true?

Solution:

A cetal formation occur in the presence of acid catalyst not in the presence of basic catalyst.

QUESTION: 13

Which of the following is a reactive intermediate in the reaction of acetone with bromine in acetic acid to form 1 -bromo-2-propanone?

Solution:

α -halogenation occur via enol intermediate of aldehydes and ketones.

QUESTION: 14

Which of the following reactions can be used to prepare the compound given below?



Solution:

All the three Grignard’s synthesis can be used to prepare the given compound.

QUESTION: 15

Compound which does not give stereoisomers on treatment with hydroxylmine is

Solution:

 is a symmetrical ketone, gives a single oxime with hydroxylamine.

QUESTION: 16

The most stable enol from of the compund   

Solution:

It is more substituted and conjugated with carbonyl groups on both side.

QUESTION: 17

What is the major product in the following reaction?

Solution:


QUESTION: 18

Give the product of the following reaction.

Solution:


QUESTION: 19

Which of the following reagent could be used to differentiate the following compounds by a visible change? 2-butanone and propanoic acid

Solution:

(d) NaHCO3 gives effervescence with CH3CH2COOH. 

QUESTION: 20

An organic compound X produces Y in the first step of oxidation which on further oxidation gave an acid. Y on treatment with ammoniacal silver nitrate solution gave a black precipitate. X is likely to be a  

Solution:

QUESTION: 21

The major product of the foilowing reaction is  

 

Solution:

It is an example of intramolecular aldol  condensation followed by dehyration of aldol.

QUESTION: 22

Which represents the best method for converting a carboxylic acid to an aldehyde?

Solution:

QUESTION: 23

You have two C6H10O ketones, I and II. Both are optically active, but I is racemised by treatment with base and II is not. Wolff-Kishner reduction of both ketones give the same achiral hydrocarbon, formula C6H12. What reasonable structures may be assigned to I and II?

Solution:



Not racemises on treatment with base because its α -carbon is not chiral.

QUESTION: 24

A C5H12O compound is optically active, and is oxidised by PCC in CH2CI2 to an optically active C5H10O product, which is racemised in acid or base. Which of the following best fits these facts?

Solution:

QUESTION: 25

Which of the following compounds would not be a possible product from the mixed aldol reaction of acetaldehyde and butanal?

Solution:

It is an α-hydroxy aldehyde, which is never formed in aldol condensation.

QUESTION: 26

Which reaction or sequence of reactions would be best used to convert cyclohexanone to cis-1,2-cyclohexanediol?

Solution:

QUESTION: 27

Arrange the following in the increasing order of reactivity towards aldol condensation reaction




Solution:

Electron withdrawing group increases reactivity while electron donating group decreases reactivity in aldoi condensation reaction.

QUESTION: 28

Provide the most suitable set of reagents required for the following trans formation.

 

Solution:


QUESTION: 29

The major organic products in the following reaction are  

I. HCOOH
II. C6H5COOH
III. CH3OH 
IV. C6H5CH2OH 

Solution:

In cross-Cannizaro reaction, formaldehyde is always oxidised, hence benzaldehyde is reduced in the present reaction.

QUESTION: 30

The major organic product formed in the following reaction is 

 

Solution:

It is an example of intramolecular Cannizaro reaction.