ECAT Pre Engineering Chemistry Chapter 23 MCQ Test With Answer

MCQ's Test For ECAT Chemistry Chapter 23 Aldehydes and Ketones

Try The MCQ's Test For ECAT Chemistry Chapter 23 Aldehydes and Ketones

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ECAT Chemistry Chapter 23 Aldehydes and Ketones

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Question # 1

Wacker method involves the conversion of alkene using PdCl2into corresponding

Question # 2

Reductive ozonolysis of benzene produces

Question # 3

Ketones are reduced to

Question # 4

Clemensen's reduction of ketones is carried out in

Question # 5

The catalytic prmoter used for the industrial preparation of acetaldehyde is

Question # 6

Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?

Question # 7

Aniline reacts with which of these to form Schiff base?

Question # 8

The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product

Question # 9

In 1903 Arthur Lapeworth became the first chemist to investigate a reaction mechanism. The reaction he investigated was that of hydrogen cyanide with propanone. What do we now call the mechanism of this reaction

Question # 10

Aldehydes give reactions :

Question # 11

Compounds X, Y and Z, all react with PCI5to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z

Question # 12

In formadaldehyde and KOH are heated then we get

Question # 13

Which is not true about acetophenone?

Question # 14

Wolf-kishner reduction is used for the reduction of

Question # 15

A food chemist wants to create the odour of pineapples for a product. An ester with this odour has the formula C3H7COOC2H5.Which pair of reagents would produce this ester

Question # 16

What is formed when propanone is refluxed with an anhydrous solution of NaBH4

Question # 17

Which of the following in incorrect?

Question # 18

In which reaction, aromatic aldehyde is treated with acid anhydride in the presence of corresponding salt of the acid to give unsaturated aromatic acid?

Question # 19

The color of ppts formed by Benedirct's test is

Question # 20

Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

Question # 21

Self condensation of acetaldehyde in the presence of dilute alkalies gives

Question # 22

A compound possessingα-hydrogen atom, in the presence of dilute alkali formsβ-hydroxy aldehyde. This product on heating with dilute acid forms an unsaturated crotonaldehyde. The compound is

Question # 23

Which of the following reactions is used for detecting presence of carbonyl group?

Question # 24

Acetone reacts with HCN to form a cyanohydrin. It is an example of:

Question # 25

Which is used for the reduction of aldehydes and ketones

Question # 26

Common names of aldehydes are given by corresponding:

Question # 27

Reduction of aldehydes with HI and P gives

Question # 28

Formaldehyde is used to make

Question # 29

Ketons are prepared by the oxidation of

Question # 30

Tollen's reagent is

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 A compound A has a molecular formula C2Cl3OH. It reduces Fehling solution and on oxidation produces a monocarboxylic acid B.A can also be obtained by the action of Cl2on Ethanol. A is
A. Chloral hydrate
B. CHCl3
C. CH3Cl
D. Chloroacetic acid
2 Which alcohol may be oxidised to a product which react with 2,4-dinitorphenylhydrazine reagent but not with Fehling's reagent
A. Butan-1-ol
B. Butan-2-ol
C. 2-methylpropan-1-ol
D. 2-methylpropan-2-ol
3 Give IUPAC name fo Acetone
A. Ethanal
B. Propanone
C. Butanone
D. Propanal
4 Compounds X, Y and Z, all react with PCI5to release hydrogen chloride, but only one of them reacts eith 2,4-dinitrophenylhydrazine reagent. Which one of the following combinations could be X, Y and Z
5 Which one of the following is a product of the reaction between C6H5CH2OH and CH3COCI
A. C6H5OCOCH3
B. C6H5CH2CI
C. C6H5CH2OCOCH3
D. C6H5CH2COCI
6 Acetone is oxidized with
A. Tollen's reagent
B. Fehling solution
C. Acidic dichromate solution
D. Benedicts solution
7 Which of the following compounds will not give iodoform test on treatment with I2/ NaOH?
A. Acetaldehyde
B. Acetone
C. Butane
D. 3-pentanone
8 Aldehydes are reduced to :
A. Pri-alcohol
B. Sec-alcohol
C. Ter-alcohol
D. All of these
9 Ketones are prepared by the oxidation of:
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. None of these
10 In aldol condensation reaction, a double bond is formed between ______ and ______ carbon atoms
A. αandβ
B. αandα
C. αand Y
D. None of these

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