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 halo form

Question # 2

Reductive ozonolysis of benzene produces

Question # 3

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

Question # 4

Ketons are prepared by the oxidation of

Question # 5

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

Question # 6

Common names of aldehydes are given by corresponding:

Question # 7

Isopropyl alcohol on oxidation forms

Question # 8

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

Question # 9

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 # 10

Which of the following compounds will react with Tollen's reagent

Question # 11

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

Question # 12

The carbon atom of a carbonyl group is

Question # 13

Chromic acid used to oxidize

Question # 14

Aldehydes are reduced to :

Question # 15

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

Question # 16

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

Question # 17

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

Question # 18

Which reaction is of condensation or addition elimination reaction?

Question # 19

Calcium acetate when dry distilled gives

Question # 20

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 # 21

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 22

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

Question # 23

Formaline Contains ______% alcohol

Question # 24

Aldehydes can be distinguished from ketones by using

Question # 25

Which of the following does not react with phenyl hydrazine?

Question # 26

Give IUPAC name fo Acetone

Question # 27

Aldehydes are produce in atmosphere by

Question # 28

In carboxyl group the bond between C and oxygen is:

Question # 29

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

Question # 30

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

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 At room temperature formaldehyde is
A. Gas
B. Liquid
C. Solid
D. None of the above
2 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
A. C2H5CI and C3H7COOH
B. C2H5OH and C3H7CONH2
C. C2H5OH and C3H7COOH
D. C3H7OH and C2H5COCI
3 Which is mild oxidizing agent ?
A. Tollen's reagent
B. KMnO4 / H2SO4
C. K2Cr2O7 / H2SO4
D. HNO3
4 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
5 Ketons are prepared by the oxidation of
A. Primary alcohol
B. Secondary alcohol
C. Tertiary alcohol
D. None of these
6 Which of the following does not react with phenyl hydrazine?
A. Ethanol
B. Ethanal
C. Acetone
D. Acetophenone
7 Wacker method involves the conversion of alkene using PdCl2into corresponding
A. Alcohol
B. Ketone
C. Aldehyde
D. Ether
8 During the mechanism of aldol condensation a/an ______ is formed
A. Oxide
B. Alkali
C. Alkoxide ion
D. None of these
9 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
10 In formadaldehyde and KOH are heated then we get
A. Acetylene
B. Methane
C. Methyl alcohol
D. Ethyl formate

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