MDCAT - UHS Past Papers - Chemistry - Chap No 14 Quiz

Attempt 10 MCQs on MDCAT - UHS Past Papers - Chemistry - Chap No 14 | Quiz 1

1. Which one of the following compounds is a ketone?

CH₃-O-CH₂-CH₃
CH₃-CO-CH₂-CH₃
CH₃COCOOH
CH₃-CH₂-CHO

2. When CH₃-CH₂-OH is oxidized in the presence of K₂Cr₂O₇ and H₂SO₄, the product formed is:

CH₃-COOH
H-COOH
CH₃-C-OCH₃
CH₃-C-OCH₃

3. Both aldehydes and ketones are planar to the plane of carbonyl group. Which one of the following bonds is distorted towards the oxygen atom?

π bonds of C and O
Sigma bond of C and H
Sigma bond of C & O
Sigma bond of C and C

4. Which one of the following is the IUPAC name of the HCHO?

Propionaldehyde
Methane
Acetaldehyde
Methanal

5. Why is it necessary to distill aldehyde formed from oxidation of primary alcohol through acidified potassium dichromate(VI) solution or acidified sodium dichromate(VI) solution?

Aldehyde formed may be oxidised further to carboxylic acid concerned
Aldehyde formed is unstable and further decomposes back to original precursor, i.e. primary alcohol
Aldehyde may be oxidised further to a ketone
Aldehyde formed may react with primary alcohol, the original reactant

6. Ketones can be made by oxidation of:

Secondary alcohols
Tertiary alcohols
Aldehydes
Primary alcohols

7. Which of the following is the correct name of CH₃CH₂CH₂COCH₂CHO?

3-Oxo-hexanal
Hexanal
Butanal
Propanal

8. Which is the most suitable reagent for the conversion of R-CH₂OH → RCHO?

KMnO₄/NaOH
K₂Cr₂O₇/H₂SO₄ (Conc.)
CrO₃
CrO₃/H₂SO₄ (Conc.)

9. What is the IUPAC name of diisopropyl ketone?

1,3-Diisopropylpropane-2-one
2,4-Dimethylpentane-3-one
2,4-Dimethylpentane-2-one
1,3-Dimethylpropane-2-one

10. C₆H₁₂O is the general formula of:

Ether
Carboxylic acid
Ketones
Carbolic acid

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