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

Ketons are prepared by the oxidation of

Question # 3

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 # 4

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

Question # 5

Which reagent will distinguish a ketone from an aldehyde

Question # 6

Cannizzzaro's reaction is not given by:

Question # 7

Aldehydes are oxidizes are to give:

Question # 8

Which of the following gives iodoform on heating with a solution of I2containing Na2CO3?

Question # 9

At room temperature formaldehyde is

Question # 10

Cannizzaro reaction is not given by

Question # 11

Formaline Contains ______% alcohol

Question # 12

Ketones are prepared by the oxidation of

Question # 13

The addition of HCN to carbonyl compounds is an example of

Question # 14

Ethanal may be converted into a three-carbon acid in a two-step process.
Which compound is the intermediate

Question # 15

Iodoform test is given by:

Question # 16

Cyanohydrin of which of the following forms lactic acid

Question # 17

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

Question # 18

Silver mirror test is applied for

Question # 19

Aldehydes give reactions :

Question # 20

Formula of acetone is:

Question # 21

Which is used for the reduction of aldehydes and ketones

Question # 22

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

Question # 23

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

Question # 24

Which compound on reaction with hydrogen cyanide produces a compound with a chiral centre

Question # 25

Wacker method involves the conversion of alkene using PdCl2into corresponding

Question # 26

Ketones are prepared by the oxidation of:

Question # 27

In which reaction, aromatic aldehyde is treated with acid anhydride in the presence of corresponding salt of the acid to give unsaturated aromatic acid?

Question # 28

Aldehydes is distinguished from ketones by using

Question # 29

Reduction of aldehydes with HI and P gives

Question # 30

Calcium acetate when dry distilled gives

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 The catalytic prmoter used for the industrial preparation of acetaldehyde is
A. PdCI2
B. CuCI2
C. Pd + CaCI2
D. None of these
2 On adding sodium nitroprusside ketones give
A. Red
B. Wine red
C. White
D. Orange
3 Which of these reactions is shown by buranone, CH3COCH2CH3
A. On warming with acidified potassium dichromative (IV) the solution turns green
B. On heating with Fehling's reagent a red precipitate is formed
C. With 2,4-dinitrophenlhydrazine reagent an orange precipitate is formed
D. With hydrogen cyanide an aldehyde is formed
4 Aldol condensation is actually
A. Electrophilic addition of carbonation
B. Electrophilic addition of carbonium ion
C. Nucleophilic addition of carbonation
D. Nuclephilic addition of carbonium ion
5 Cannizzaro's reaction in not given by
A. Formaldehyde
B. Acetaldehyde
C. Benzaldyhyde
D. Trimethylacetaldehyde
6 Which of the following does not turn Schiff's reagent to pink?
A. Formaldehyde
B. Bezaldehyde
C. Aceton
D. Methyl chloride
7 Aldehydes which do not haveα-hydrogen undergo
A. Aldol combination
B. Cannizzaro's reaction
C. Substitution
D. Elimination
8 Which compound on reaction with hydrogen cyanide produces a compound with a chiral centre
A. Ch3CHO
B. CH3CH2COCH2CH3
C. CH3CO2CH3
D. HCHO
9 Which of the following reagents is used to distinguish acetone and acetophenone
A. NaHSO3
B. Grinard reagent
C. Na2SO4
D. NH4Cl
10 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

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