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

Dehydration of allcohol gives:

Question # 2

Chromic acid used to oxidize

Question # 3

In aldol condensation reaction, a double bond is formed between ______ and ______ carbon atoms

Question # 4

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

Question # 5

Benzophenone can be converted into benzene using

Question # 6

Acetone is prepared by

Question # 7

Ketones are prepared by the oxidation of:

Question # 8

Aldehydes are oxidizes are to give:

Question # 9

Aldelydes are the oxidation product of

Question # 10

Aldehydes is distinguished from ketones by using

Question # 11

Give IUPAC name fo Acetone

Question # 12

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

Question # 13

Reaction of Grignard's reagent with formaldehyde gives:

Question # 14

Aldehydes which do not haveα-hydrogen undergo

Question # 15

Formula of acetone is:

Question # 16

Aldehydes can be distinguished from ketones by

Question # 17

Aldehydes are reduced to :

Question # 18

On adding sodium nitroprusside ketones give

Question # 19

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

Question # 20

Aldehydes can be distinguished from ketones by using

Question # 21

Which is not true about acetophenone?

Question # 22

Which of the following does not react with phenyl hydrazine?

Question # 23

The carbon atom of a carbonyl group is

Question # 24

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 # 25

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 # 26

Aldehydes give reactions :

Question # 27

The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product

Question # 28

Self condensation of acetaldehyde in the presence of dilute alkalies gives

Question # 29

Cannizzaro reaction is not given by

Question # 30

Formaldehyde is used to make

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 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
2 Give IUPAC name fo Acetone
A. Ethanal
B. Propanone
C. Butanone
D. Propanal
3 Which of the following compounds will react with Tollen's reagent
4 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
A. Na(s)
B. NaBH4
C. NaOH(aq)
D. 2,4-dinitrophenylhydrazine reagent
5 Silver mirror test is applied for
A. Aldehydes
B. Alcohols
C. Acids
D. Esters
6 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
7 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
8 Which one of the following is a product of the reaction between C6H5CH2OH and CH3COCI
A. C6H5OCOCH3
B. C6H5CH2CI
C. C6H5CH2OCOCH3
D. C6H5CH2COCI
9 Aldehydes is distinguished from ketones by using
A. Tollen's reagent
B. Benedict reagent
C. Fehling solution
D. All of the above
10 The color of ppts formed by Benedirct's test is
A. Brick red
B. Wine red
C. Yellow
D. Orange

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