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

Aldehydes give reactions :

Question # 2

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

Question # 3

Aledehydes ketones can be prepared form alcohols by their:

Question # 4

On adding sodium nitroprusside ketones give

Question # 5

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 6

A common industrial solvent is a mixture of propanone; CH3COCH3, and pentyl ethanoate CH3CO2(CH2)4CH3. Which reagent would have no effect on this solvent

Question # 7

Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

Question # 8

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 # 9

Formula of acetone is:

Question # 10

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 # 11

The homologous series of aldehydes and ketones have general formula:

Question # 12

Which isomer of C5H11OH gives, one dehydration, the greastest number of different alkenes

Question # 13

The carbon atom of a carbonyl group is

Question # 14

In aldol condensation reaction, a double bond is formed between ______ and ______ carbon atoms

Question # 15

Which of the following is hypnotic?

Question # 16

Tollen's reagent is

Question # 17

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

Question # 18

Which compound on reaction with hydrogen cyanide produces a compound with a chiral centre

Question # 19

Ketons are prepared by the oxidation of

Question # 20

Aldelydes are the oxidation product of

Question # 21

The catalytic prmoter used for the industrial preparation of acetaldehyde is

Question # 22

Formaline Contains ______% alcohol

Question # 23

The addition of HCN to carbonyl compounds is an example of

Question # 24

Which reagent will distinguish a ketone from an aldehyde

Question # 25

The base used in Cannizzaro's reaction is

Question # 26

On heating acetaldehyde with ammonical silver nitrate solution, we get

Question # 27

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

Question # 28

Which is used for the reduction of aldehydes and ketones

Question # 29

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

Question # 30

Which of the following react with NaOH to produce an acid and an alcohol?

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Which of the following will have the highest boiling point
A. Methanol
B. Ethanol
C. Propanal
D. 2-hexanone
2 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?
A. Cyclohexanol
B. Cyclohex-2-enol
C. Cyclohexanone
D. Benzene
3 Which of the following compounds does not react with NaHSO3?
A. C6H5CHO
B. Acetophenone
C. Acetone
D. Acetaldehyde
4 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
A. Propanal and mesitylene
B. Propanone and mesityl oxide
C. Propanone and 2, 6-dimethyl-2,5-heptadien-4-one
D. Propanone and mesitylene oxide
5 Which of the following compounds gives a ketone with Grignard's reagent?
A. Formaldehyde
B. Ethanenitrile
C. Ethyl alcohol
D. Methyl iodide
6 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
7 Ketones are reduced to
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. All of these
8 Which of the following will have the highest boiling point?
A. Methanal
B. Ethanal
C. Propanal
D. 2-Hexanone
9 In formadaldehyde and KOH are heated then we get
A. Acetylene
B. Methane
C. Methyl alcohol
D. Ethyl formate
10 Chromic acid used to oxidize
A. Aldehyde
B. Ketone
C. Both a and b
D. None of these

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