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 is distinguished from ketones by using

Question # 2

Tollen's reagent is

Question # 3

Aldehydes are oxidizes are to give:

Question # 4

Which of the following compounds gives a ketone with Grignard's reagent?

Question # 5

Formaline Contains ______% alcohol

Question # 6

Chromic acid used to oxidize

Question # 7

Which is mild oxidizing agent ?

Question # 8

In carboxyl group the bond between C and oxygen is:

Question # 9

Wacker method involves the conversion of alkene using PdCl2into corresponding

Question # 10

Silver mirror test is applied for

Question # 11

Which one of the following reagents will distinguish between C6H5CHO and C6H5COCH3

Question # 12

Benzophenone can be converted into benzene using

Question # 13

Formalin is:

Question # 14

Which of the following does not turn Schiff's reagent to pink?

Question # 15

Give IUPAC name fo Acetone

Question # 16

Ketones are reduced to

Question # 17

Acetal is produced by reacting alcohol in the presence of dry HCl with

Question # 18

Condensation of aldeydes withα-hydrogen gives:

Question # 19

Which compound would undergo nucleophilic addition

Question # 20

Aldehydes can be distinguished from ketones by using

Question # 21

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

Question # 22

Reaction of Grignard's reagent eith aldehyds other formaldehyde gives: Reaction of Grignard's reagent with formaldehyde gives:

Question # 23

The color of ppts formed by Fehling's test is

Question # 24

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 25

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 # 26

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

Question # 27

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 # 28

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Formalin is:
A. 10% solution of formaldehyde in water
B. 20% solution of formaldehyde in water
C. 40% solution of formaldehyde in water
D. 60% solution of formaldehyde in water
2 Aledehydes ketones can be prepared form alcohols by their:
A. Reduction
B. Oxidation
C. Decomposition
D. Synthesis
3 Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH4or LiAIH4?
A. 1-propanol
B. 2-propanol
C. 2-Methyl-2-propanol
D. Ethanol
4 Wacker method involves the conversion of alkene using PdCl2into corresponding
A. Alcohol
B. Ketone
C. Aldehyde
D. Ether
5 Which reaction is of condensation or addition elimination reaction?
A. Ketol
B. Aldol
C. Cannizzaro
D. All of these
6 Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?
A. Methanal
B. Ethanol
C. Propanone
D. Ethanal
7 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
A. C2H5CI and C3H7COOH
B. C2H5OH and C3H7CONH2
C. C2H5OH and C3H7COOH
D. C3H7OH and C2H5COCI
8 In which reaction, aromatic aldehyde is treated with acid anhydride in the presence of corresponding salt of the acid to give unsaturated aromatic acid?
A. Friedel-Crafts reaction
B. Perkin's reaction
C. Wurtz reaction
D. None of these
9 Formaldehyde is used to make
A. Plastics
B. Medicine
C. Antiseptic
D. All of these
10 Iodoform test is given by:
A. Formaldehyde and Higher ketones
B. Formaldehyde
C. Acetaldehyde and methyl ketones
D. Acetaldehyde

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