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

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

Question # 2

Acetaldehyde is used to make

Question # 3

Aldehydes are oxidizes are to give:

Question # 4

In carboxyl group the bond between C and oxygen is:

Question # 5

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 # 6

Ketons are prepared by the oxidation of

Question # 7

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

Question # 8

Reaction of Grignard's reagent with formaldehyde gives:

Question # 9

Which of the following does not react with phenyl hydrazine?

Question # 10

Aldehydes are reduced to :

Question # 11

The IUPAC name fo CH3COCH (CH3)2is

Question # 12

The homologous series of aldehydes and ketones have general formula:

Question # 13

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

Question # 14

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 15

In Tolten's best, the end product is ______ formed

Question # 16

Which of the following will have the highest boiling point

Question # 17

The addition of HCN to carbonyl compounds is an example of

Question # 18

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 # 19

Hydroxyl amine is a derivative of::

Question # 20

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

Question # 21

Acetone is prepared by

Question # 22

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 23

Formaline Contains ______% alcohol

Question # 24

Propyne on hydrolysis in presence of H2SO4and HgSO4gives

Question # 25

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

Question # 26

Aldehydes give reactions :

Question # 27

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 # 28

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

Question # 29

A nucleophilic reagent will readily Attack

Question # 30

Aldehydes and ketones are carbonyl compounds. Which of them react both with NaBH4and with Tollen's reagent

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Reaction of Grignard's reagent with formaldehyde gives:
A. pri-alcohol
B. sec-alcohol
C. ter-alcohol
D. carboxylic
2 Wolf-kishner reduction is used for the reduction of
A. Nitro compounds
B. Carboxylic acids
C. Carbonyl compounds
D. Olefins
3 Which of the following compounds will react with Tollen's reagent
4 Clemensen's reduction of ketones is carried out in
A. H2with Pd catalyst
B. Glycol with KOH
C. LiAIH4in water
D. Zn-Hg with conc. HCl
5 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
6 Which one of the following statement is wrong regarding differences between aldehydes and ketones
A. Aldehydes undergo reduction to form primary alcohols while ketones undergo reduction to form secondary alcohols
B. Aldehydes undergo oxidation to form acids having less number of carbon atoms while ketones undergo oxidation to form acids having same number of carbon atoms
C. Aldehydes give positive silver mirror test while ketones give negative -mirror test
D. Aldehydes can undergo polymerization while ketones cannot undergo polymerizarion
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 Reductive ozonolysis of benzene produces
A. Acetone
B. Maleic anhydride
C. Phthalic acid
D. Glyoxal
9 Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution
A. White
B. Red
C. Yellow
D. None of these
10 The addition of HCN to carbonyl compounds is an example of
A. Nucleopihlic substituion
B. Electrophilic addition
C. Nueleophilic addition
D. Electrophilic substitution

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