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NEET Exam  >  NEET Tests  >  Test: Preparation of Aldehydes and Ketones (February 13) - NEET MCQ

Test: Preparation of Aldehydes and Ketones (February 13) - NEET MCQ


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10 Questions MCQ Test - Test: Preparation of Aldehydes and Ketones (February 13)

Test: Preparation of Aldehydes and Ketones (February 13) for NEET 2024 is part of NEET preparation. The Test: Preparation of Aldehydes and Ketones (February 13) questions and answers have been prepared according to the NEET exam syllabus.The Test: Preparation of Aldehydes and Ketones (February 13) MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Preparation of Aldehydes and Ketones (February 13) below.
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Test: Preparation of Aldehydes and Ketones (February 13) - Question 1
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Only One Option Correct Type

Direction (Q. Nos. 1-12) This section contains 12 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.

Q. 

An optically active organic compound has molecular formula C5H12O(X). X on oxidation with CrO3/H2SO4 gives an achiral C5H10O. Hence, X could be

Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 1

Oxidation of X giving ketone as well as X is chiral, it must be a secondary alcohol with a-chiral carbon.

Test: Preparation of Aldehydes and Ketones (February 13) - Question 2
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The incorrect statement regarding oxo process for synthesis of an aldehyde is

Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 2

In an oxo process, formylation (addition of H and CHO) of double bond takes place, hence ketones cannot be synthesised in direct oxo process.

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Test: Preparation of Aldehydes and Ketones (February 13) - Question 3
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Consider the following reaction,

All of the following reagents can bring about the above transformation except

Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 3

Alkaline permanganate (Baeyer’s reagent) also oxidises olefinic bonds to syn vicinal-diols.

Test: Preparation of Aldehydes and Ketones (February 13) - Question 4
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A hydrocarbon X(C7H12) on ozonolysis followed by the treatment with (CH3)2S gives C7H12O2 which gives positive Tollen’s test as well as positive iodoform test. The compoppd below satisfying the criteria of X is
Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 4

The ozonolysis product of X is a dicarbonyl which contains both aldehyde group and CH3CO— group.

Test: Preparation of Aldehydes and Ketones (February 13) - Question 5
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What is the final major product of the following reaction
Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 5

Test: Preparation of Aldehydes and Ketones (February 13) - Question 6
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Consider the following reaction sequence,

Q. 

The correct statement regarding X is
Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 6

*Multiple options can be correct
Test: Preparation of Aldehydes and Ketones (February 13) - Question 7
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In which of the following reactions, ketone is formed as the major organic product?
Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 7

If acid derivatives like nitrile, acid chlorid e or ester is taken in excess in Grignard synthesis, second addition of Grignard’s reagent on carbonyl product does not succeed and carbonyls are obtained as major products.
In option (b), carboxylic acids and in option (d), an aldehyde is formed.

*Multiple options can be correct
Test: Preparation of Aldehydes and Ketones (February 13) - Question 8
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Consider the following reaction, 

Q. 

Reagent(s) that can bring about the above reaction successfully is/are
Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 8

Both Rosenmund reduction (Pd/BaSO4)and reduction with Li[{(CH3)CO}3AIH] at - 80°C are effective in reducing acid chlorides into aldehydes.

Test: Preparation of Aldehydes and Ketones (February 13) - Question 9
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Comprehension Type

Direction (Q. Nos. 18-20) 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

A hydrocarbon A (C10H18) is capable of showing both enantiomerism as well as diastereomerism. Treatment of A either with HgSO4 / H2SO4 or B2H6 / H2O2 -NaOH results in the same carbonyl compound B. Also,

  C can also be obtained as one of the product in the following reaction.

Q. 

What is the most likely structure of B?
Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 9

Compound A has a triple bond and it is symmetrical because its partially reduced product B gives single ozonolysis product C, Also, A shows both enantiomerism and diastereomerism, it must be

As shown above, A has two chiral carbons but simultaneously, it is symmetrical. Hence, it has both meso and a pair of enantiomers as stereoisomers.

Test: Preparation of Aldehydes and Ketones (February 13) - Question 10
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A hydrocarbon A (C10H18) is capable of showing both enantiomerism as well as diastereomerism. Treatment of A either with HgSO4 / H2SO4 or B2H6 / H2O2 -NaOH results in the same carbonyl compound B. Also,

 C can also be obtained as one of the product in the following reaction.

Consider the reaction given below,

Q. 

How many different alcohols are expected?
Detailed Solution for Test: Preparation of Aldehydes and Ketones (February 13) - Question 10

Compound A has a triple bond and it is symmetrical because its partially reduced product B gives single ozonolysis product C, Also, A shows both enantiomerism and diastereomerism, it must be

As shown above, A has two chiral carbons but simultaneously, it is symmetrical. Hence, it has both meso and a pair of enantiomers as stereoisomers.

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