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Test: Preparation of Aldehydes and Ketones(7 Dec) - JEE MCQ


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Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 1

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(7 Dec) - 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(7 Dec) - Question 2

Which of the following reaction will not produce an aldehyde?

Detailed Solution for Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 2

Anti vicinal-diols do not undergo oxidative cleavage with HIO4.

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Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 3

Which reagent below cannot reduce an acid chloride to an aldehyde?

Detailed Solution for Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 3

Na /C2 H5OH further reduces aldehydes to alcohols.

Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 4

The incorrect statement regarding oxo process for synthesis of an aldehyde is

Detailed Solution for Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 4

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

Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 5

All of the following reaction gives atleast one ketone as a significant organic product except

Detailed Solution for Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 5

It gives aldehydes as major product.

Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 6

All of the following results in the formation of an aldehyde except

Detailed Solution for Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 6

It gives a ketone.

Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 7

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(7 Dec) - Question 7

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

Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 8

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(7 Dec) - Question 8

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

Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 9

A hydrocarbon X has molecular formula C5H10 X on treatment with B2H6 in H2O2 /NaOH gives an optically active C5H12O which on treatment with CrO3/HCI / pyridine gives C5H10O which is still chiral. Which of the following can be a product of reductive ozonolysis of X?

Detailed Solution for Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 9

Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 10

What is the final major product of the following reaction

Detailed Solution for Test: Preparation of Aldehydes and Ketones(7 Dec) - Question 10

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