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 compounds will not give iodoform test on treatment with I2/ NaOH?

Question # 2

Carboxyl compounds have functional group:

Question # 3

Aldehydes is distinguished from ketones by using

Question # 4

Wolf-kishner reduction is used for the reduction of

Question # 5

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 # 6

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 7

Aldehyde and small methyl ketones form crystalline ______ ppts with saturated sodium bisulphate solution

Question # 8

Which of these reactions is shown by buranone, CH3COCH2CH3

Question # 9

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

Question # 10

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 # 11

Which of the following reagent will react with both aldehyde and ketones?

Question # 12

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

Question # 13

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 # 14

Which of the following in incorrect?

Question # 15

The IUPAC name fo CH3COCH (CH3)2is

Question # 16

Cannizzaro reaction is not given by

Question # 17

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 # 18

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

Question # 19

Formaldehyde is used to make

Question # 20

Common names of aldehydes are given by corresponding:

Question # 21

Tollen's reagent is

Question # 22

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

Question # 23

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

Question # 24

On adding sodium nitroprusside ketones give

Question # 25

Which of the following is halo form

Question # 26

From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?

Question # 27

The colour of ppts formed by Fehling's test is

Question # 28

The addition of HCN to carbonyl compounds is an example of

Question # 29

Cannizzaro's reaction is type of reaction:

Question # 30

Formaline Contains ______% alcohol

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 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
2 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
3 From which of the following tertiary butyl alcohol is obtained by the action of methyl magnesium iodide?
A. HCHO
B. CH3CHO
C. CH3COCH3
D. CO2
4 Aldehydes can be distinguished from ketones by
A. 2,4-DNPH test
B. NaHSO3test
C. N2H4test
D. Tollen's test
5 The catalytic prmoter used for the industrial preparation of acetaldehyde is
A. PdCI2
B. CuCI2
C. Pd + CaCI2
D. None of these
6 Acetaldehyde is used to make
A. Rubbber
B. Antiseptics
C. Phenolic resin
D. All of these
7 The colour of ppts formed by Fehling's test is
A. Brick red
B. Red
C. Yellow
D. Orange
8 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
9 In which reaction, aromatic aldehyde is treated with acid anhydride in the presence of corresponding salt of the acid to give unsaturated aromatic acid?
A. Friedel-Crafts reaction
B. Perkin's reaction
C. Wurtz reaction
D. None of these
10 Which alcohol may be oxidised to a product which react with 2,4-dinitorphenylhydrazine reagent but not with Fehling's reagent
A. Butan-1-ol
B. Butan-2-ol
C. 2-methylpropan-1-ol
D. 2-methylpropan-2-ol

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