Aldehydes And Ketones Test

Result

Aldehydes And Ketones Test - 23

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Weekly Quiz Competition

Question 1
1 / -0

Acetophenone when reacted with a base C₂H₅ONa, yield a stable compound which has the structure

A

B

C

D

Solution

It is condensation reaction
Question 2
1 / -0

During reduction of carbonyl compounds by H₂NNH₂ and KOH, the first intermediane is :

A
RC≡N

B
RCONH₂

C
RCH=NH

D
RCH=NNH₂

Solution
Question 3
1 / -0

The product formed by the reaction of chlorine with benzaldehyde in the absence of a catalyst is

A
Chlorobenzne

B
Benzyl chloride

C
Benzoyl chloride

D
o- Chlronenzaldehyde

Solution
Question 4
1 / -0

Hexamethylene tetramine is used as

A
Analgesic

B
Antipyretic

C
Urinary antiseptic

D
All of these

Solution

Hexamethylene tetramine (uroptropine) it is used for the treatment of urinary tract infection (Urinary antiseptic). It decomposes at an acidic pH to form formaldehyde and ammonia, and the formaldehyde is bactericidal
Question 5
1 / -0

The major organic product formed from the following reaction

A

B

C

D

Solution
Question 6
1 / -0

What is X in the equation below

A
K₂Cr₂O₇/H⁺

B
NaBH₄

C
H₂/Ni

D
Both a and b

Solution

NaBH₄ is used for selective reduction of a carbonyl group in a molecule that contains booth C=C and C=O bonds as it does not reduce isolated C=C bonds
Question 7
1 / -0

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

A
HCHO

B
CO₂

C
CH₃COCH₃

D
CH₃CHO

Solution
Question 8
1 / -0

When calcium benzoate and calcium formate are heated they form

A
acetophenone

B
benzaldehyde

C
benzophenone

D
formaldehyde

Solution
Question 9
1 / -0

Alkaline hydrolysis R₂C.Cl₂ forms

A
alkanal

B
alkanone

C
propane

D
propanone

Solution
Question 10
1 / -0

Fehling's solution is :

A
Acidified copper sulphate solution

B
Copper sulphate and sodium hydroxide + Rochelle salt

C
Ammonical cuprous chloride solution

D
Ammonical AgNO₃ solution

Solution

Hint: Fehling's solution is made up of Fehling solution A and Fehling solution B. It gives a positive test for aliphatic aldehydes.

Explanation:

Fehling solution A- alkaline copper sulfate

Fehling solution B- aqueous sodium potassium tartrate (Rochelle salt)

Fehling's solution = solution A + solution B

The reaction of the fehlings solution with aliphatic aldehyde is as shown below;