Mock Test - 01 : Acids, Bases and Salts

Boost Your Class 10 Science Preparation with Our Acids, Bases and Salts MCQ Mock Test!

Are you ready to test your understanding of Acids, Bases and Salts from Class 10 Science? This interactive MCQ-based mock test is designed to strengthen your concepts, improve your speed, and prepare you for exam-style questions. Covering all the important topics such as properties of acids and bases, uses of indicators, neutralization reactions, the pH scale, common salts, and their applications, this test will help you revise effectively and identify areas that need extra focus.

With carefully selected multiple-choice questions, this mock test not only boosts your confidence but also gives you a real exam-like experience. Whether you’re preparing for school exams or board exams, attempting this test will sharpen your problem-solving skills and help you score higher.

Attempt now and challenge yourself to see how well you know Acids, Bases and Salts!

1. A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowishorange. Which of the following would change the colour of this pH paper to greenish-blue?

Lemon juice

Vinegar

Common salt

An antacid

2. When a small amount of acid is added to water, the phenomena which occur are:

(A) Dilution

(B) Neutralisation

(D) Salt formation

The correct statements are:

(A) and (C)

(B) and (D)

(A) and (B)

3. Equal 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? (You may use colour guide given in figure)

Red

Yellow

Yellowish Green

Blue

4. Which of the following salts does not contain water of crystallisation?

Blue vitriol

Baking soda

Washing soda

Gypsum

5. The graph given below depicts a neutralization reaction (acid + alkali → salt + water). The pH of a solution changes as we add excess of acid to an alkali.

Which letter denotes the area of the graph where both acid and salt are present?

6. Sodium carbonate is a basic salt because it is a salt of

strong acid and strong base.

weak acid and weak base.

strong acid and weak base.

weak acid and strong base.

7. Which of the following oxide(s) is/are soluble in water to form alkalies?

(i) Na₂O (ii) SO₂ (iii) K₂O (iv) NO₂

(i) and (iii)

(i) only

(ii) and (iv)

(iii) only

8. Which of the following statement is not correct?

All metal carbonates react with acid to give salt, water and carbon dioxide.

All metal oxides react with water to give salt and acid.

Some metals react with acids to give salt and hydrogen.

Some non-metal oxides react with water to form an acid.

9. A solution of NaCl
(i) will turn red litmus blue
(ii) will turn pH paper green
(iii) will turn blue litmus red
(iv) will not affect litmus

(i) and (ii)

(i), and, (iii)

(i) and (iv)

(ii) and (iv)

10. Which of the given options correctly represents the parent acid and base of calcium carbonate?

Option	Parent Acid	Parent Base
(a)	HCl	NaOH
(b)	H₂CO₃	Ca(OH)₂
(c)	H₃PO₃	CaSO₄
(d)	H₂SO4	CaSO₄

(a)

(b)

(c)

(d)

11. How will you protect yourself from the heat generated while diluting a concentrated acid?

By adding acid to water with constant stirring.

By adding water to acid with constant stirring.

By adding water to acid followed by base.

By adding base to acid with constant stirring.

12. Which of the following gives the correct increasing order of acidic strength ?

Water < Acetic acid < Hydrochloric acid

Water < Hydrochloric acid < Acetic acid

Acetic acid < Water < Hydrochloric acid

Hydrochloric acid < Water < Acetic acid

13. An aqueous solution with pH = 1 is

strongly acidic

strongly basic

neutral

weakly acidic

14. Which fruit is basic in nature?

Apples

Strawberries

Oranges

Banana

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

basic

acidic

neutral

amphoteric

16. Which of the following are present in a dilute aqueous solution of hydrochloric acid?

H3O+ + Cl–

H3O+ + OH–

Cl– + OH–

unionised HCl

17. Which of the following is(are) true when HCl (g) is passed through water?
(i) It does not ionise in the solution as it is a covalent compound.
(ii) It ionises in the solution.
(iii) It gives both hydrogen and hydroxyl ion in the solution.
(iv) It forms hydronium ion in the solution due to the combination of hydrogen ion with water molecule.

(i) only

(iii) only

(ii) and (iv)

(iii) and (iv)

18. Dry slaked lime reacts with Cl₂ gas to form

CaCl2

CaOCl2

Ca(OH)2

CaO

19. In which of the following setups would the bulb glow?

20. 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 to red.

21. The change in colour of the moist litmus paper in the given set up is due to

(i) presence of acid

(ii) presence of base

(iii) presence of H⁺(aq) in the solution

(iv) presence of litmus which acts as an indicator

(i) and (ii)

Only (ii)

Only (iii)

Only (iv)

22. In the following questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:

Assertion: Ammonium hydroxide is Weak Base
Reason: Phenolphthalein becomes pink in NH₂OH

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.

Assertion is true but the Reason is false.

Assertion is false but the Reason is true.

23. Identify gas A in the following experiment.

Nitrogen

Hydrogen

Oxygen

Carbon dioxide

24. Adding which of the following to a colourless solution would give an indication that the solution could possibly be hydrochloric acid?

Copper metal strips

Silver metal strips

Calcium carbonate

Sodium chloride

25. Study the diagram given below and identify the gas formed in the reaction.

Carbon dioxide which extinguishes the burning candle.

Oxygen due to which the candle burns more brightly.

Sulphur dioxide which produces a suffocating smell.

Hydrogen which while burning produces a popping sound.

26. Which of the following is not a acidic salt?

CuSO4

NH4Cl

FeCl3

CH4COONa

27. In the following questions, the Assertion and Reason have been put forward. Read the statements carefully and choose the correct alternative from the following:

Assertion: Carbonic acid is weak acid
Reason: It ionised completely in aqueous solution.

Both the Assertion and the Reason are correct and the Reason is the correct explanation of the Assertion.

The Assertion and the Reason are correct but the Reason is not the correct explanation of the Assertion.

Assertion is true but the Reason is false.

Assertion is false but the Reason is true.

28. Many salts absorbs water from atmosphere. This property is called

deliquescence

efflorescence

hydration

addition

29. CaOCl₂ will liberate Cl₂ gas in presence of

(i) CO₂ (ii) HCl (iii) CO (iv) NO

(i) and (ii)

(ii) and (iii)

(i) and (iv)

(ii) and (iv)

30. Which of these graphs shows how the pH of milk changes as it forms curd?

Question 1 of 30