The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is : Item-I Item-II (I) Benzene (P) HCl and SnCl 2 , H 3 O + (II) Benzonitrile (Q) H 2 , Pd - BaSO 4 , S and quinoline (III) Benzoyl Chloride (R) Co , HCl and AlCl 3

(I)-(R), (II)-(P) and (III)-(Q)

(I)-(Q), (II)-(R) and (III)-(P)

(I)-(P), (II)-(Q) and (III)-(R)

(I)-(R), (II)-(Q) and (III)-(P)

HARD

Earn 100

Predict the structures of ketones produced by hydration of but- $1$ -yne and but- $2$ -yne.

Important Questions on Aldehydes, Ketones and Carboxylic Acids

EASY

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

Identify compound (A) in the following reaction :

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MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

The major product of the following reaction is:

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MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

An alkene on ozonolysis gives methanal as one of the product. Its structure is

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

The major product of the following reaction sequence is

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HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

In the following reaction

A

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

Reductive ozonolysis of

{({CH}_{3})}_{2} C = C {({CH}_{3})}_{2}

followed by hydrolysis gives

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

The major product obtained from the following reaction is :

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EASY

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

The reaction of acetylene with

H_{2} O

, in the presence of a catalytic amount of

{HgSO}_{4}

and dilute

H_{2} {SO}_{4}

, gives the product

A

. Compound

A

, upon treatment with aqueous

NaOH

, forms

B

. What are

A

and

B

HARD

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

The number of chiral centres present in

[B]

is _____

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is :

	Item-I		Item-II
(I)	Benzene	(P)	$HCl$ and ${SnCl}_{2}, H_{3} O +$
(II)	Benzonitrile	(Q)	$H_{2}, Pd - {BaSO}_{4}, S$ and quinoline
(III)	Benzoyl Chloride	(R)	$Co, HCl and {AlCl}_{3}$

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

The major product obtained in the reaction of isobutyl benzene with acetic anhydride in the presence of anhydrous

{AlCl}_{3}

is:

EASY

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

Calcium butanoate on heating followed by treatment with 1, 2-ethanediol in the presence of catalytic amount of an acid, produces a major product which is:

MEDIUM

Chemistry>Organic Chemistry>Aldehydes, Ketones and Carboxylic Acids>Preparation of Aldehydes and Ketones

Which of the following is obtained by hydrogenation of benzoyl chloride in presence of