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 of the following is hypnotic?

Question # 2

In carboxyl group the bond between C and oxygen is:

Question # 3

Which one of the following is a product of the reaction between C6H5CH2OH and CH3COCI

Question # 4

Formula of acetone is:

Question # 5

Calcium acetate when dry distilled gives

Question # 6

Common names of aldehydes are given by corresponding:

Question # 7

Give IUPAC name fo Acetone

Question # 8

C2H5CHO and (CH3)2CO can be distunguished by testing with

Question # 9

Benzophenone can be converted into benzene using

Question # 10

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 # 11

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

Question # 12

Ketones are prepared by the oxidation of

Question # 13

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

Question # 14

Formalin is an aqueous solution of

Question # 15

Aldehydes are oxidizes are to give:

Question # 16

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 # 17

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

Question # 18

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 19

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

Question # 20

Iodoform test is given by:

Question # 21

Which of the following will have the highest boiling point

Question # 22

An organic compound has the following properties ; It gives a positive tri-iodomethane test; it gives a yellow ppt, with 2, 4-DNP regent; it does not react with Tollen's reagent . Which compound would give these results

Question # 23

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 24

Aldehydes which do not haveα-hydrogen undergo

Question # 25

Ketones are reduced to

Question # 26

Ketones are prepared by the oxidation of:

Question # 27

Aromatic aldehydes undergo disproportionation in presence of sodium or potassium hydroxide to give corresponding alcohol and acid. The reaction is known as

Question # 28

Cannizzaro reaction is not given by

Question # 29

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

Question # 30

Which reaction is of condensation or addition elimination reaction?

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 When vapours of isopropyl alcohol are passed over heated copper, the major product obtained is
A. Propane
B. Propylene
C. Acetaldehyde
D. Acetone
2 In Tolten's best, the end product is ______ formed
A. White ppts
B. Red ppts
C. Yellow ppts
D. Silver mirror
3 Aldehydes can be distinguished from ketones by using
A. Schiff's reagent
B. Conc. H2SO4
C. Anhy. ZnCl2
D. Resorcinol
4
Question Image
A. Br2(aq)
B. 2, 4-dinitrophenylhydrazine
C. NaBH
D. Tollen's reagent
5 Acetone reacts with HCN to form a cyanohydrin. It is an example of
A. Electrophilic addition
B. Electrophilic substitution
C. Nucleophilic addition
D. Nucleophilic substitution
6 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
7 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
A. Formaldehyde
B. Butyraldehyde
C. Propionaldehyde
D. Acetone
8 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
9 In 1903 Arthur Lapeworth became the first chemist to investigate a reaction mechanism. The reaction he investigated was that of hydrogen cyanide with propanone. What do we now call the mechanism of this reaction
A. Electrophilic addition
B. Electrophilic substitution
C. Nucleophilic addition
D. Nucleophilic substitution
10 Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:
A. Pri-alcohol
B. Sec-Alcohol
C. Ter-alcohol
D. Carboxylic

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