MCQ Questions for Class 10 Science Chapter 2 Acids, Bases and Salts with Answers

Class 10 Science Chapter 2 MCQ (Multiple Choice Questions) of Acids, Bases and Salts. All the MCQs are taken from NCERT Textbooks issued for session 2021-2022. Answers and explanation of MCQ tests are given just below each questions.

Q1. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?

(a) Baking power
(b) Lime
(c) Ammonium hydroxide solution
(d) Hydrochloric acid

(d) Hydrochloric acid

Q2. Egg shell is made up of

(a) CaCO3
(b) CaO
(c) Ca(OH)2
(d) CaCl2

(a) CaCO3

Q3. Which of the following is not a acidic salt?

(a) CuSO4
(b) NH4Cl
(c) FeCl3
(d) CH3COONa

(d) CH3COONa

Q4. Farmers neutralise the effect of acidity of the soil by adding

(a) slaked lime
(b) gypsum
(c) caustic soda
(d) baking soda

(a) slaked lime

Q5. A teacher gave two test tubes to the students, one containing water and the other containing sodium hydroxide. She asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for the identification?

(a) Blue litmus
(b) Red litmus
(c) Sodium carbonate solution
(d) Dilute hydrochloric acid

(b) Red litmus

Q6. One of the constituents of baking powder is sodium hydrogencarbonate, the other constituent is

(a) hydrochloric acid
(b) tartaric acid
(c) acetic acid
(d) sulphuric acid

(b) tartaric acid

Q7. Increase in the OH– ion concentration, leads to

(a) an increases in the pH of solution
(b) a decrease in the pH of the solution
(c) doesn’t alter the pH of the solution
(d) decreases the basic strength of the solution

(a) an increases in the pH of solution

Q8. Which Of The Following Salts Does Not Contain Water Of Crystallization?

[A]. Blue vitriol
[B]. Baking soda
[C]. Washing soda
[D]. Gypsum

[B]. Baking soda

Q9. Consider The Following Statement And Choose The Incorrect One:

[A]. An indicator is a dye that changes colour when it is put into an acid or a base.
[B]. The most common indicators to test for acids and bases are litmus, methyl orange and phenolphthalein.
[C]. The most common indicator used for testing acids and bases in the laboratory is phenolphthalein.
[D]. None of the above

[C]. The most common indicator used for testing acids and bases in the laboratory is phenolphthalein.

Q10. If A Few Drops Of Concentrated Acid Accidentally Spill Over The Hand Of A Student, What Should Be Done?

[A]. Wash the hand with saline solution.
[B]. Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate.
[C]. After washing with plenty of water apply solution of sodium hydroxide on the hand.
[D]. Neutralise the acid with a strong alkali.

[B]. Wash the hand immediately with plenty of water and apply a paste of sodium hydrogen carbonate.

Q11. Common Salt Besides Being Used In Kitchen Can Also Be Used As The Raw Material For Making:

[A]. Washing soda, Bleaching soda
[B]. Washing soda, Bleaching soda, Slaked lime
[C]. Washing soda, Bleaching soda, Baking soda
[D]. Washing soda, Baking soda, Slaked lime

[C]. Washing soda, Bleaching soda, Baking soda

Q12. One Of The Constituents Of Baking Powder Is Sodium Hydrogen Carbonate, The Other Constituent Is

[A]. Hydrochloric acid
[B]. Tartaric acid
[C]. Acetic acid
[D]. Sulphuric acid

[D]. Sulphuric acid

Q13. Parmindar Is Writing Some Statements About Polyester. In Which Of The Following Statements Is Or Are Incorrect? Help Him.

[A]. Dilute hydrochloric acid reacts with copper (II) oxide to form copper (II) chloride and water.
[B]. Acids are never stored in metal containers or glass and ceramics because they gradually corrode and eat up the metal container.
[C]. The reaction between acids and metal oxides is a kind of “Neutralization reaction”.
[D]. Milk of Magnesia is a metal hydroxide called ‘magnesium hydroxide’ which is used to remove indigestion caused too much hydrochloric acid in the stomach.

[B]. Acids are never stored in metal containers or glass and ceramics because they gradually corrode and eat up the metal container.

Q14. Which Of The Following Is Used For Dissolution Of Gold?

[A]. Hydrochloride acid
[B]. Sulphuric acid
[C]. Nitric acid
[D]. Aqua- regia

[D]. Aqua- regia

Q15. A substance has a tendency to give proton H+ in aqueous solution. This substance is :

(a) acid
(b) base
(c) alkali
(d) salt

(a) acid

Q16. Strength of an acid and base depends on :

(a) molecular weight
(b) equivalent weight
(c) degree of ionization
(d) boiling point

Q17. pH of an aqueous solution is 4. Hydrogen ion concentration mol/litre of this solution is :

(a) 4
(b) 1.0 × 10-4
(c) 10.
(d) 1.0 × 104

(d) 1.0 × 104

Q18. An aqueous solution of HCl with 108 mol/litre has pH value

(a) less than 7
(b) 7
(c) 8
(d) 14

Q19. In alkaline solution colour of methyl orange will be :

(a) red
(b) yellow
(c) blue
(d) colourless

(b) yellow

Q20. In acidic medium colour of phenolphthalein will be:

(a) pink
(b) yellow
(c) blue
(d) colourless

(d) colourless

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