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

MCQ Questions for Class 10 Science Chapter 2 Acids, Bases and Salts can help students build their test-taking skills and prepare for exams. It is a great way for students to assess their understanding of the concepts taught in class.

Chapter 2 Class 10 Science CBSE MCQ Questions can provide a quick way to check understanding and identify any areas that may need more revision. Many students find themselves struggling with managing their time efficiently, especially when it comes to studying for exams.

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

1. Which of the following properties is closely related to acids?
(a) Contain the hydroxide ion
(c) Salty taste
(b) Bitter taste
(d) Sour taste
▶ (d) Sour taste

2. Tomato is a natural source of which acid?
(a) Acetic acid
(b) Citric acid
(c) Tartaric acid
(d) Oxalic acid
▶ (d) Oxalic acid

3. In general, salts
(a) are ionic compounds.
(b) contain hydrogen ions.
(c) contain hydroxide ions.
(d) turn blue litmus red.
▶ (a) are ionic compounds.

4. Which solution will change blue litmus to red?
(a) NaOH(aq)
(b) H₂SO₄(aq)
(c) KCl(aq)
(d) NH₄OH(aq)
▶ (b) H₂SO₄(aq)

5. Brine is an
(a) aqueous solution of sodium hydroxide
(b) aqueous solution of sodium carbonate
(c) aqueous solution of sodium chloride
(d) aqueous solution of sodium bicarbonate
▶ (c) aqueous solution of sodium chloride

6. A base can be prepared by the reaction between
(a) an active non-metal and water.
(c) a sulphide and water.
(b) a gas and water.
(d) an active metal and water.
▶ (d) an active metal and water.

7. Na₂CO₃.10H₂O is
(a) washing soda
(b) baking soda
(c) bleaching powder
(d) tartaric acid
▶ (a) washing soda

8. Which of the following will turn red litmus blue
(a) Mg(OH)₂
(b) Citric acid
(c) Carbonic acid
(d) Acetic acid
▶ (a) Mg(OH)₂

9. Sodium carbonate is a basic salt because it is a salt of
(a) strong acid and strong base
(b) weak acid and weak base
(c) strong acid and weak base
(d) weak acid and strong base
▶ (d) weak acid and strong base

10. Alkalis are
(a) acids, which are soluble in water
(b) acids, which are insoluble in water
(c) bases, which are insoluble in water
(d) bases, which are soluble in water
▶ (d) bases, which are soluble in water

11. Which of the following will conduct electricity?
(a) Glucose solution
(b) Ethanol solution
(c) Acetic acid solution
(d) Dry HCl (g)
▶ (c) Acetic acid solution

12. Rain is called acid rain when its:
(a) pH falls below 7
(b) pH falls below 6
(c) pH falls below 5.6
(d) pH is above 7
▶ (c) pH falls below 5.6

13. Lime water reacts with chlorine to give
(a) bleaching powder
(c) baking soda
(b) baking powder
(d) washing soda
▶ (a) bleaching powder

14. Nettle sting is a natural source of which acid?
(a) Methanoic acid
(b) Lactic acid
(c) Citric acid
(d) Tartaric acid
▶ (a) Methanoic acid

15. An aqueous solution turns red litmus solution blue. Excess addition of which of the following solution would reverse the change?
(a) Baking powder
(b) Lime
(c) Ammonium hydroxide solution
(d) Hydrochloric acid
▶ (d) Hydrochloric acid

16. When copper oxide and dilute hydrochloric acid react, colour changes to
(a) white
(c) blue-black
(b) bluish-green
(d) black
▶ (b) bluish-green

17. Tooth enamel is made up of
(a) calcium phosphate
(b) calcium carbonate
(c) calcium oxide
(d) potassium
▶ (a) calcium phosphate

18. Which of the following acid is present in sour milk?
(a) glycolic acid
(b) lactic acid
(c) citrus acid
(d) tartaric acid
▶ (b) lactic acid

19. Lime water reacts with chlorine to form
(a) CaCl
(b) CaOCl
(c) Ca(ClO₃)₂
(d) CaO₂Cl₂
▶ (b) CaOCl

20. The ratio of the water molecule in Plaster of Paris and Gypsum is
(a) 3:1
(b) 1:3
(c) 1:4
(d) 4:3
▶ (c) 1:4

21. Sodium hydroxide turns phenolphthalein solution
(a) pink
(b) yellow
(c) colourless
(d) orange
▶ (a) pink

22. The chemical name of bleaching powder is
(a) calcium hypo oxychloride
(b) calcium oxychloride
(c) calcium chloride
(d) calcium chlorooxide
▶ (b) calcium oxychloride

23. Sodium hydroxide is used
(a) as an antacid
(b) in manufacture of soap
(c) as a cleansing agent
(d) in alkaline batteries
▶ (b) in manufacture of soap

24. NaOH is obtained by electrolysis of
(a) Aq. solution of NaCl
(b) Aq. Na2CO₃
(c) Aq. NaHCO₃
(d) Molten NaCl
▶ (a) Aq. solution of NaCl

25. The pH of a solution is 4.0. What should be the change in the hydrogen ion concentration of the solution, if its pH is to increased to 5.0.
(a) decreases to 1/10 of its original concentration
(b) halved
(c) doubled
(d) increases by 10 times
▶ (a) decreases to 1/10 of its original concentration

26. When base reacts with the non-metal oxide
(a) it neutralizes each other
(b) it creates fire
(c) it produces acidic salts
(d) it produces basic salts
▶ (a) it neutralizes each other

27. Rubbing of which does give relief from pain in the case of bee sting?
(a) Dilute hydrochloric acid
(b) Dilute nitric acid.
(c) Tooth paste
(d) Alkali
▶ (c) Tooth paste

28. The pH of a solution is 5.0. Its hydrogen ion concentration is decreased by 100 times, the solution will be:
(a) more acidic
(b) basic
(c) neutral
(d) unaffected
▶ (c) neutral

29. The acid used for the manufacture of fertilizers and explosives is
(a) nitric acid
(b) sulphuric acid
(c) phosphoric acid
(d) hydrochloric acid
▶ (a) nitric acid

30. Corrosive effect on the skin is caused by
(a) acids and bases
(b) bases and salts
(c) water
(d) mercury
▶ (a) acids and bases

31. Which of the following salts does not contain water of crystallisation?
(a) Blue vitriol
(b) Baking soda
(c) Washing soda
(d) Gypsum
▶ (b) Baking soda

32. Calcium phosphate is present in tooth enamel. Its nature is
(a) basic
(b) acidic
(c) neutral
(d) amphoteric
▶ (a) basic

33. What is the original colour of phenolphthalein solution which is an indicator?
(a) Red
(b) Violet
(c) Colourless
(d) Pink
▶ (c) Colourless

34. What happens when an acid is added to
(a) Colour of vanilla changes into red
(b) Vanilla becomes colourless
(c) Vanilla loses its smell
(d) Nothing happens
▶ (d) Nothing happens