JOIN ADRE 2.0 Telegram Group

Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids MCQs | Class 12 Chemistry Chapter 12 Aldehydes, Ketones and Carboxylic Acids Objective Type Questions and Answers

Questions
1 Which one of the following on oxidation gives a ketone?
A primary alcohol
B secondary alcohol
C tertiary alcohol
D All of these

Answer:secondary alcohol
2 Consider the following transformations
CH3COOHThe molecular formula of C is
A
B ICH2-COCH3
C CHI3
D CH3I

Answer:ICH2-COCH3
3 A and B in the following reactions are
A
B
C
D

Answer:
4 The product formed in aldol condensation is
A a beta-hydroxy acid
B a beta-hydroxy aldehyde or a beta-hydroxy ketone
C an alpha-hydroxy aldehyde or ketone
D an alpha, beta unsaturated ester

Answer:a beta-hydroxy aldehyde or a beta-hydroxy ketone
5 Consider the following reaction,

The product Z is
A toluene
B benzaldehyde
C benzoic acid
D benzene

Answer: benzoic acid
6 Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called
A Clemmenson reduction
B Cope reduction
C Dow reduction
D Wolff-Kishner reduction

Answer:Clemmenson reduction
7 Aldol condensation will not take place in
A HCHO
B CH3CHO
C CH3COCH3
D CH3CH2CHO

Answer:HCHO
8
In the above reaction product, 'P' is
A
B
C
D

Answer:
9 The -OH group of an alcohol or the -COOH group of a carboxylic acid can be replaced by -Cl using
A phosphorus pentachloride
B hypochlorous acid
C chlorine
D hydrochloric acid

Answer: phosphorus pentachloride
10 An ester is boiled with KOH. The product is cooled and acidified with conc. HCl. A white crystalline acid separates. The ester is
A methyl acetate
B ethyl acetate
C ethyl formate
D ethyl benzoate

Answer:ethyl benzoate
11 The compound formed when malonic acid heated with urea, is
A cinnamic acid
B butyric acid
C barbituric acid
D crotonic acid

Answer:barbituric acid
12 What is formed when a primary alcohol undergoes catalytic dehydrogenation?
A Aldehyde
B Ketone
C Alkene
D Acid

Answer: Aldehyde
13 The compound which on reduction with LiAlH4 gives two diffrent alcohols:
A CH3COOCH3
B CH3COOC2H5
C CH3COCH3
D CH3CHO

Answer:CH3COOCH3
14 HCHO and HCOOH are distinguished by treating with:
A Tollens reagent
B NaHCO3
C Fehling's Solution
D Benedict Solution

Answer:NaHCO3
15 Lacrymator or tear gas is:

A C6H5COCl
B C6H5OC6H5
C C6H5COCH2Cl
D C6H5COCH3

Answer:C6H5COCH2Cl
16 Formaldehyde can be distinguished from acetaldehyde by:
A Fehling's solution
B Schiff's reagent
C Ammonia
D Ammoniacal AgNO3

Answer: Ammonia
17 The correct acidity order of the following is:
A (III)>(IV)>(II)>(I)
B (IV)>(III)>(I)>(II)
C (III)>(II)>(I)>(IV)
D (II)>(III)>(IV)>(I)

Answer:(III)>(IV)>(II)>(I)
18 Acetone reacts with iodine (I2) to form iodoform in the presence of
A CaCO3
B NaOH
C KOH
D MgCO3

Answer: NaOH
19 Genrally Aldehydes behave as:
A oxidising agent
B reducing agent
C dehydration agent
D oxidizing as well as reducing agent

Answer: reducing agent
20 Compound (A) C5H10O forms a phenyl hydrazone and gives negative Tollen's and iodoform tests. Compound (A) on reduction gives n-pentane. Compound (A) is:
A a primary alcohol
B an aldehyde
C a ketone
D a secondary alcohol

Answer: a ketone

ADRE 2.0 FULL LENGTH MOCK TEST

Take Mock Tests

Missiles Mock Test Start Test!
SSC MTS Mock Test Start Test
IBPS CLERK MOCK TEST Start Test
SSC MTS 2022 JULY 26 Shift 1 (ENGLISH) Start Test!
SSC GD Previous Year Paper 2021 Nov 17 Shift - I (Hindi) Start Test!
SSC CGL Tier - 1 PYP 2022 April 21 Shift- 1 (ENGLISH) Start Test!
MPSC PAPER I MOCK TEST 1 (ENGLISH) Start Test!
IB Security Assistant Mock test 1 (english) Start Test!
UP POLICE CONSTABLE MOCK TEST 1 Start Test!
DELHI POLICE CONSTABLE MOCK TEST 1 (HINDI) Start Test!

Chapters

Advertisement
Assam Direct Recruitment Test Series