Free Printable REVISION LESSON: CHEMICAL TEST (SK025)

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REVISION LESSON: CHEMICAL TEST (SK025)

Total questions: 14

Worksheet time: 14mins

Name

Class

Date

1.

Which of the following will be formed when 2-butene reacts with cold alkaline KMnO₄?

a)

I ONLY

b)

I & II ONLY

c)

II & III ONLY

d)

I, II & III

2.

Ethene and ethane can be differentiated by using

a)

Acidified KMnO₄

b)

Br₂, CH₂Cl₂ in the absence of light or heat

c)

Concentrated sulphuric acid, H₂SO₄

d)

2,4-Dinitrophenylhydrazine

3.

When aqueous iron(III) chloride is added to phenol,

a)

Chlorobenzene is formed

b)

White fumes are given off

c)

A purple solution is formed

d)

Iron (III) is reduced to iron (II)

4.

Which of the following is formed when bromine water is added to phenol?

a)

b)

c)

d)

5.

Which of the following is expected to give a yellow precipitate when reacted with an alkaline iodine solution?

a)

b)

c)

d)

6.

Oxidation of 2-butanol produces compound X. X is expected to........

You may choose more than one answer

a)

Give an orange precipitate with Brady's reagent

b)

Give a negative reaction with Tollen's reagent

c)

Gives a yellow precipitate with an alkaline iodine solution

7.

When bromine water is added to phenol,

a)

White fumes produces

b)

A white precipitate is formed

c)

The reddish brown colour of bromine is decolourised

8.

Both ethanal and propanone will give the SAME observation with....

(You may choose more than one answer)

a)

Alkaline iodine solutions

b)

Silver diamine complex solution

c)

Fehling's solution

d)

2,4-dinitrophenylhydrazine

9.

An organic compound X has the following chemical properties:

Produce brick-red precipitate when reacted with Fehling's solution

Forms a silver mirror precipitate with an ammoniacal solution of silver nitrate

a)

b)

c)

d)

10.

Which of the following can be used to differentiate between ethanal and other aldehydes?

a)

Hot alkaline Cu²⁺solution

b)

Tollen's reagent

c)

2,4-dinitrophenylhydrazine

d)

Alkaline iodine solution

11.

Which of the following statements is/are true regarding aldehydes?

(You may choose more than one correct answers)

a)

All aldehydes reacts with Fehling's solution to form a brick-red precipitate

b)

Ethanal is the only aldehyde to react with alkaline iodine solution to give a yellow precipitate

c)

All aldehydes reduce Tollen's reagent.

d)

All aldehydes give an orange precipitate with 2,4-dinitrophenylhydrazine

12.

Compound X reacts with nitrous acid at 3^oC to release nitrogen gas. Compound X is

a)

b)

c)

d)

13.

Dimethylamine is reacted with a mixture of sodium nitrite, NaNO₂ and dilute hydrochloric acid, HCl at 5^oC. Which of the following compounds is the product?

a)

b)

c)

d)

14.

Which of the following can be used to distinguish aniline from cyclohexanamine?

(You may choose more than one correct answer)

a)

Hinsberg's Test

b)

Nitrous Acid Test

c)

Bromine Water

d)

2,4-dinitrophenylhydrazine

Reset

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