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

Common names of aldehydes are given by corresponding:

Question # 2

In formadaldehyde and KOH are heated then we get

Question # 3

Cannizzaro's reaction in not given by

Question # 4

Reaction of Grignard's reagent with formaldehyde gives:

Question # 5

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

Question # 6

Aldehydes can be distinguished from ketones by

Question # 7

Which alcohol may be oxidised to a product which react with 2,4-dinitorphenylhydrazine reagent but not with Fehling's reagent

Question # 8

Which of the following reagents is used to distinguish acetone and acetophenone

Question # 9

Distillation of calcium salts of acetic acid and formic acids gives acetaldehyde. What compound would be obtained if only calcium salt of acetic acid is distilled

Question # 10

Ketones are prepared by the oxidation of

Question # 11

An organic compound 'A' has the molecular formula C3H6O, it undergoes iodoform test. When saturated with HCl it gives 'B' of molecular formula C9H14O. A and B, respectively are

Question # 12

Propyne on hydrolysis in presence of H2SO4and HgSO4gives

Question # 13

Dehydration of allcohol gives:

Question # 14

The catalytic prmoter used for the industrial preparation of acetaldehyde is

Question # 15

The color of ppts formed by Fehling's test is

Question # 16

Which compound would undergo nucleophilic addition

Question # 17

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

Question # 18

Reductive ozonolysis of benzene produces

Question # 19

Formalin is an aqueous solution of

Question # 20

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 # 21

Aldehydes which do not haveα-hydrogen undergo

Question # 22

When vapours of isopropyl alcohol are passed over heated copper, the major product obtained is

Question # 23

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

Question # 24

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction (MPV). What will be the final product when cyclohex-2-enone is selectively reduces in MPV reaction?

Question # 25

Aldehydes are reduced to :

Question # 26

In carboxyl group the bond between C and oxygen is:

Question # 27

The color of ppts formed by Benedirct's test is

Question # 28

Isopropyl alcohol on oxidation forms

Question # 29

Carboxyl compounds have functional group:

Question # 30

Tollen's reagent is

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Benzophenone can be converted into benzene using
A. Fused alkali
B. Anhydrous AlCl3
C. Sodium amalgam in water
D. Acidfied dichromate
2 Which of these reactions is shown by buranone, CH3COCH2CH3
A. On warming with acidified potassium dichromative (IV) the solution turns green
B. On heating with Fehling's reagent a red precipitate is formed
C. With 2,4-dinitrophenlhydrazine reagent an orange precipitate is formed
D. With hydrogen cyanide an aldehyde is formed
3 Propyne on hydrolysis in presence of H2SO4and HgSO4gives
A. Acetaldehyde
B. Acetone
C. Formaldehyde
D. None
4 Which compound would undergo nucleophilic addition
A. Ethene, C2H4
B. Bromoethane, C2H5Br
C. Ethanal, CH3CHO
D. Ethane, C2H6
5 The carbon atom of a carbonyl group is
A. Sp hybridized
B. Sp2hybridized
C. Sp3hybridized
D. None of these
6 Formaline Contains ______% alcohol
A. 80
B. 37
C. 8
D. 52
7 Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?
A. Aldol condensation
B. Reimer Tiemann reaction
C. Cannizaaor's reaction
D. Wolf-kishner reduction
8 In formadaldehyde and KOH are heated then we get
A. Acetylene
B. Methane
C. Methyl alcohol
D. Ethyl formate
9 Aldehydes are reduced to :
A. Pri-alcohol
B. Sec-alcohol
C. Ter-alcohol
D. All of these
10 The carbon of a carbonyl group is:
A. sp hybridized
B. sp2 hybridized
C. sp3 Hybidized
D. None of these

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