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

Reduction with aluminium isopropoxide in excess of Isopropyl alcohol is called Meerwein Ponndroff-Verley reduction (MPV). What will be the final product when cyclohex-2-enone is selectively reduces in MPV reaction?

Question # 2

On heating acetaldehyde with ammonical silver nitrate solution, we get

Question # 3

The homologous series of aldehydes and ketones have general formula:

Question # 4

Isopropyl alcohol on oxidation forms

Question # 5

Which of the following is halo form

Question # 6

Which reaction yields Bakelite?

Question # 7

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 8

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBH4or LiAIH4?

Question # 9

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

Question # 10

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

Question # 11

The colour of ppts formed by Fehling's test is

Question # 12

On adding sodium nitroprusside ketones give

Question # 13

Cannizzaro's reaction in not given by

Question # 14

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 # 15

Which of the following is hypnotic?

Question # 16

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

Question # 17

Aldehydes are oxidizes are to give:

Question # 18

Ketons are prepared by the oxidation of

Question # 19

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 # 20

When vapours of isopropyl alcohol are passed over heated copper, the major product obtained is

Question # 21

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

Question # 22

Carboxyl compounds have functional group:

Question # 23

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

Question # 24

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

Question # 25

Which of the following does not react with phenyl hydrazine?

Question # 26

Give IUPAC name fo Acetone

Question # 27

Which reagent will distinguish a ketone from an aldehyde

Question # 28

Which of the following in incorrect?

Question # 29

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 # 30

In formadaldehyde and KOH are heated then we get

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 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
2 Which of the following compounds will not give iodoform test on treatment with I2/ NaOH?
A. Acetaldehyde
B. Acetone
C. Butane
D. 3-pentanone
3 Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?
A. Methanal
B. Ethanol
C. Propanone
D. Ethanal
4 Which is mild oxidizing agent ?
A. Tollen's reagent
B. KMnO4 / H2SO4
C. K2Cr2O7 / H2SO4
D. HNO3
5 Which of the following does not turn Schiff's reagent to pink?
A. Formaldehyde
B. Bezaldehyde
C. Aceton
D. Methyl chloride
6 Formaline Contains ______% alcohol
A. 80
B. 37
C. 8
D. 52
7 Which of the following react with NaOH to produce an acid and an alcohol?
A. NCHO
B. CH3COOH
C. CH3CH2COOH
D. C6H5COOH
8 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
9 Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives
A. Benzyl alcohol
B. Benzaldehyde
C. Benzoic acid
D. Phenol
10 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

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