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)

MEDIUM

Earn 100

Ozonolysis of an organic compound $' A'$ produces acetone and propionaldehyde in equimolar mixture. Identify $' A'$ from the following compounds.

50% studentsanswered this correctly

Important Questions on Aldehydes and Ketones

EASY

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

Identify compound (A) in the following reaction :

Question Image

HARD

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

A substance

C_{4} H_{10} O

, yields on oxidation a compound,

C_{4} H_{8} O

which gives an oxime and a positive iodoform test. The original substance on treatment with concentrated

H_{2} {SO}_{4}

gives

C_{4} H_{8} .

The structure of the compound is

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

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

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

The major product of the following reaction sequence is

Question Image

HARD

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

In the following reaction

A

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>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 and Ketones>Preparation of Aldehydes and Ketones

The major product obtained from the following reaction is :

Question Image

EASY

Chemistry>Organic Chemistry>Aldehydes and Ketones>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 and Ketones>Preparation of Aldehydes and Ketones

List

- I

includes starting materials and reagents of selected chemical reactions. List

- II

gives structures of compounds that may be formed as intermediate products and/or final products from the reactions of List

- I

List-I	List-II
(I)	$(P)$
(II)	$(Q)$
(III)	$(R)$
(IV)	$(S)$
	$(T)$
	$(U)$

Which of the following options has the correct combination considering List

- I

and List

- II

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>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 and Ketones>Preparation of Aldehydes and Ketones

The major product of the following reaction is:

Question Image

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

The major product obtained in the following reaction is

Question Image

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>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:

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

An alkene of molecular formula

C_{9} H_{18}

, on ozonolysis gives

2, 2 -

dimethylpropanal &

2 -

butanone, then the alkene is

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

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

Pd

{BaSO}_{4}

EASY

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

Which of the following is Rosenmund reduction?

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

What are the products formed in the reaction given below:

$Ph - {CH}_{2} - CH = CH - {CH}_{3} \to_{^{Zn dust + H_{2} O}}^{1) O_{3}}$ ?

HARD

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

Consider the following reactions:

Question Image

'A' is

MEDIUM

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

An alkene

' A'

on reaction with

O_{3}

and

Z n - H_{2} O

gives propanone and ethanal in equimolar ratio. Additional of

H C l

to alkene

' A'

gives

' B'

as the major product. The structure of product

' B'

is:

EASY

Chemistry>Organic Chemistry>Aldehydes and Ketones>Preparation of Aldehydes and Ketones

The major product of the following reaction is,

Question Image

Ozonolysis of an organic compound 'A' produces acetone and propionaldehyde in equimolar mixture. Identify 'A' from the following compounds.

Important Questions on Aldehydes and Ketones

Learn and Prepare for any exam you want !

Ozonolysis of an organic compound $' A'$ produces acetone and propionaldehyde in equimolar mixture. Identify $' A'$ from the following compounds.