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

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

Question # 2

Aldehydes can be distinguished from ketones by

Question # 3

Iodoform test is given by:

Question # 4

A compound R has all of the following properties. It is neutral; It gives an orange precipitate with 2,4-dinitrophenythydrazine; it evolves hydrogen chloride when treated with PCI5in the cold What could R be

Question # 5

Which of the following will have the highest boiling point

Question # 6

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

Question # 7

On adding sodium nitroprusside ketones give

Question # 8

The base used in Cannizzaro's reaction is

Question # 9

During the mechanism of aldol condensation a/an ______ is formed

Question # 10

Aldehydes are oxidizes are to give:

Question # 11

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

Question # 12

Self condensation of acetaldehyde in the presence of dilute alkalies gives

Question # 13

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

Question # 14

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

Question # 15

The addition of HCN to carbonyl compounds is an example of

Question # 16

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 # 17

Reductive ozonolysis of benzene produces

Question # 18

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

Question # 19

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

Question # 20

Formaldehyde is used to make

Question # 21

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

Question # 22

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

Question # 23

Isopropyl alcohol on oxidation forms

Question # 24

Ketones are reduced to

Question # 25

Cannizzaro reaction is not given by

Question # 26

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 # 27

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 28

Which of the following in incorrect?

Question # 29

Silver mirror test is applied for

Question # 30

Which of the following will have the highest boiling point?

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 Carboxyl compounds have functional group:
A. R-C-X
B. R-CH=O
C. RCOR
D. All
2 Which compound on reaction with hydrogen cyanide produces a compound with a chiral centre
A. Ch3CHO
B. CH3CH2COCH2CH3
C. CH3CO2CH3
D. HCHO
3 A compound R has all of the following properties. It is neutral; It gives an orange precipitate with 2,4-dinitrophenythydrazine; it evolves hydrogen chloride when treated with PCI5in the cold What could R be
4 Which of the following does not react with phenyl hydrazine?
A. Ethanol
B. Ethanal
C. Acetone
D. Acetophenone
5 Tollen's reagent is
A. Ammonical cuprous chloride
B. Ammonical cuprous oxide
C. Ammonical silver bromide
D. Ammonical silver nitrate
6 Formalin is an aqueous solution of
A. Furfural
B. Fluorescein
C. Formaldehyde
D. Formic acid
7 Acetone is oxidized with
A. Tollen's reagent
B. Fehling solution
C. Acidic dichromate solution
D. Benedicts solution
8 What is formed when propanone is refluxed with an anhydrous solution of NaBH4
A. Propanal
B. Propan-1-ol
C. Propan-2-ol
D. Propane
9 Which compound would undergo nucleophilic addition
A. Ethene, C2H4
B. Bromoethane, C2H5Br
C. Ethanal, CH3CHO
D. Ethane, C2H6
10 Self condensation of acetaldehyde in the presence of dilute alkalies gives
A. An acetal
B. An aldol
C. Mesitylene
D. Propionaldehyde

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