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

Hydrogenation of bezoyl chloride in presence of Pd on BaSO4gives

Question # 2

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

Question # 3

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

Question # 4

Self condensation of acetaldehyde in the presence of dilute alkalies gives

Question # 5

Which of the following compounds will not give iodoform test on treatment with I2/ NaOH?

Question # 6

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

Question # 7

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

Question # 8

The carbon atom of a carbonyl group is

Question # 9

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

Question # 10

Aldehydes are produce in atmosphere by

Question # 11

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

Question # 12

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 # 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

Formaldehyde is used to make

Question # 15

Aldehydes which do not haveα-hydrogen undergo

Question # 16

Which of the following compounds will react with reagent ?

Question # 17

Reaction of Grignard's reagent with ketones gives: Reaction of Grignard's reagent with formaldehyde gives:

Question # 18

Which of the following will have the highest boiling point

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

Aldelydes are the oxidation product of

Question # 23

Which compound would undergo nucleophilic addition

Question # 24

Which of the following organic compounds exhibits positive Fehling test as well as iodoform test?

Question # 25

Which of the following will have the highest boiling point?

Question # 26

Condensation of aldeydes withα-hydrogen gives:

Question # 27

Which of the following is a method of converting a unsaturated ketone into unsaturated hydrocarbon?

Question # 28

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

Question # 29

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

Question # 30

Which of the following in incorrect?

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ECAT Chemistry Chapter 23 Important MCQ's

Sr.# Question Answer
1 In formadaldehyde and KOH are heated then we get
A. Acetylene
B. Methane
C. Methyl alcohol
D. Ethyl formate
2 The addition of HCN to carbonyl compounds is an example of
A. Nucleopihlic substituion
B. Electrophilic addition
C. Nueleophilic addition
D. Electrophilic substitution
3 Give IUPAC name fo Acetone
A. Ethanal
B. Propanone
C. Butanone
D. Propanal
4 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
5 The product of the reaction between propanone and HCN is hydrolysed under acidic conditions. What is the formula of the final product
A. CH3CH(OH)COOH
B. CH3CH2CH(OH)COOH
C. (CH3)2C(OH)COOH
D. CH3CH2CH2COOH
6 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?
A. Cyclohexanol
B. Cyclohex-2-enol
C. Cyclohexanone
D. Benzene
7 Which of the following is hypnotic?
A. Acetaldehyde
B. Metaldehyde
C. Paraldehyde
D. None
8 Which of the following reagent will react with both aldehyde and ketones?
A. Grinard's reagent
B. Tollen's reagent
C. Fehling's reagent
D. Benedict's reagent
9 Which of the following compounds will react with reagent ?
A. CH3 CO H
B. CH3 CO CH3
C. CH3 COOH
D. CH3 CO CH2CH3
10 Which of the following will have the highest boiling point
A. Methanol
B. Ethanol
C. Propanal
D. 2-hexanone

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