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

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 3

Aldehydes are oxidizes are to give:

Question # 4

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

Question # 5

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

Question # 6

Chromyl chloride and toluene react to produce

Question # 7

Which of the following is hypnotic?

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

Which of the following in incorrect?

Question # 10

A nucleophilic reagent will readily Attack

Question # 11

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

Question # 12

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

Question # 13

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 # 14

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

Question # 15

For which one of the following pairs of compounds can the members be distinguished by means of Tollen's test

Question # 16

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

Question # 17

Aldehydes can be distinguished from ketones by using

Question # 18

Aldehydes is distinguished from ketones by using

Question # 19

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

Question # 20

Dehydration of allcohol gives:

Question # 21

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

Question # 22

Which is used for the reduction of aldehydes and ketones

Question # 23

Which of the following does not react with phenyl hydrazine?

Question # 24

Which of the following will have the highest boiling point

Question # 25

Self condensation of acetaldehyde in the presence of dilute alkalies gives

Question # 26

At room temperature formaldehyde is

Question # 27

Ketones are prepared by the oxidation of

Question # 28

Formaline Contains ______% alcohol

Question # 29

Which reagent could be used to distinguish between CH3CH(OH)CH2CHO and CH3COCH2CH2OH

Question # 30

Which one of the following statement is wrong regarding differences between aldehydes and ketones

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Aldehydes which do not haveα-hydrogen undergo
A. Aldol combination
B. Cannizzaro's reaction
C. Substitution
D. Elimination
2 Formaline Contains ______% alcohol
A. 80
B. 37
C. 8
D. 52
3 Propyne on hydrolysis in presence of H2SO4and HgSO4gives
A. Acetaldehyde
B. Acetone
C. Formaldehyde
D. None
4 The carbon atom of a carbonyl group is
A. Sp hybridized
B. Sp2hybridized
C. Sp3hybridized
D. None of these
5 Ethanal may be converted into a three-carbon acid in a two-step process.
Which compound is the intermediate
A. CH3CO2H
B. CH3CN
C. CH3CH2CN
D. CH3CH(OH)CN
6 C2H5CHO and (CH3)2CO can be distunguished by testing with
A. Phenyl hydrazine
B. Hydroxylamine
C. Fehling solution
D. Sodium bisulphate
7 Common names of aldehydes are given by corresponding:
A. Ketone
B. Alcohol
C. Carboxylic acid
D. ester
8 Reductive ozonolysis of benzene produces
A. Acetone
B. Maleic anhydride
C. Phthalic acid
D. Glyoxal
9 Which of the following does not turn Schiff's reagent to pink?
A. Formaldehyde
B. Bezaldehyde
C. Aceton
D. Methyl chloride
10 Which of the following in incorrect?
A. FelCl3is used in the detection of phenols
B. Fehling solution is used in the detection of glucose
C. Tollen's reagent is used in detection of unsaturation
D. NaHSO3is used in the detection of carbonyl compounds

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