Science : Ch 02 – Acids Bases and Salts

This test is designed based on NCERT Syllabus for Class 10 Topics : Acids Bases and Salts

Each time random 15 questions will be displaced
So retake the quiz till you have mastered all the questions

1 / 15

Calcium phosphate is present in tooth enamel. Its nature is:

Basic

Acidic

Neutral

Amphoteric

2 / 15

If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done?

Wash the hand with a saline solution

Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate

After washing with plenty of water, apply a solution of sodium hydroxide on the hand

Neutralise the acid with a strong alkali

3 / 15

identical volumes of hydrochloric acid and sodium hydroxide solutions of same concentration are mixed and the pH of the resulting solution is checked with a pH paper. What would be the colour obtained?

Red

Yellow

Yellowish green

Blue

4 / 15

Identify the true representation of reaction occurring during chloralkali process.

2NaCl(l) + 2H₂O(l) → 2NaOH(l) + Cl₂(g) + H₂(g)

2NaCl(l) + 2H₂O(aq) → 2NaOH(aq) + Cl₂(g) + H₂(aq)

2NaCl(aq) + 2H₂O(l) → 2NaOH(aq) + Cl₂(aq) + H₂(aq)

2NaCl(aq) + 2H₂O(l) → 2NaOH(aq) + Cl₂(g) + H₂(g)

5 / 15

Which of the subsequent is/are true when HCl(g) is passed through water?

It does not ionise in the solution as it is a covalent compound

It ionises in the solution

It gives both hydrogen and hydroxyl ions in the solution.

It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule

2 and 4

1

2

3 and 4

6 / 15

The chemical formula for methonic acid

H2COH

HOOCH

HCOOH

None

7 / 15

Antacid are

Acidic in nature

Basic in nature

both

none

8 / 15

What types of ions are formed when an acid is dissolved in water ?

H+ ions are formed

H<sub>2</sub>0 +

OH- ions

None

9 / 15

The pH of pure water is

4

5

6

7

10 / 15

The source of lactic acid is

curd

milk

butter

none

11 / 15

The chemical used for cleaning swimming pools

chlorine

Bromium

Potassium

none

12 / 15

Hydrogen is used in manufacture

of ammonia for fertilizers and as Rocket fuel.

soaps

dyes

none

13 / 15

How many water molecules are present in plaster of paris

one third

half

4

2

14 / 15

Which of the following statements is true for acids?

Bitter and change red litmus to blue

Sour and change red litmus to blue

Sour and change blue litmus to red.

Bitter and change blue litmus red

15 / 15

The other name of methanoic acid is

Formic acid

sulpuric acid

Hydrochloric acid

none

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Science : Ch 02 – Acids Bases and Salts

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