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)

Consider the following reaction Propanal + Methanal = → ( ii ) Δ ( iii ) NaCN ( iv ) H 3 O + ( i ) dil . NaOH P roduct B ( C 5 H 8 O 3 ) The correct statement for product B is. It is

racemic mixture and gives a gas with saturated NaHCO 3 solution

optically active and adds one mole of bromine

optically active alcohol and is neutrall

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: can be easily reduced using Zn - Hg / HCl to Reason R: Zn - Hg / HCl is used to reduce carbonyl group to – CH 2 – group. In the light of the above statements, choose the correct answer from the options given below:

Both A and R are true but R is not the correct explanation of A

Both A and R are true and R is the correct explanation of A

E M B I B E

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 8th April 2019 Shift 2>Q 25

HARD

JEE Main

IMPORTANT

Earn 100

The major product obtained in the following reaction is:

33.33% studentsanswered this correctly

Important Questions on Aldehydes, Ketones and Carboxylic Acids

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 8th April 2019 Shift 1>Q 26

The major product of the following reaction is:
Question Image

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 7th January 2020 Shift 1>Q 27

What is the product of following reaction?
Question Image

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 7th April 2013>Q 28

An organic compound A upon reacting with

{NH}_{3}

gives B. On heating, B gives C. C in presence of KOH reacts with Br₂ to give CH₃CH₂NH₂. A is :

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 6th April 2014>Q 29

In the reaction,

{CH}_{3} COOH \overset{{LiAlH}_{4}}{\to} A \overset{{PCl}_{5}}{\to} B \overset{Alc. KOH}{\to} C

,

the product C is :

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 6 September 2020 Shift 2>Q 30

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)	$Co, HCl and {AlCl}_{3}$

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 6 September 2020 Shift 1>Q 31

Consider the following reactions:

Question Image

'A' is

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 6 September 2020 Shift 1>Q 32

The major product obtained from the following reaction is :

Question Image

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 26 - Aldehydes, Ketones and Carboxylic Acids>JEE Main - 5 September 2020 Shift 1>Q 33

Which of the following derivatives of alcohols is unstable in an aqueous base?

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