🧪 Acids, Bases and Salts – 60 MCQs

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1–10 Basic Properties

1. Acids taste:
A. Sweet
B. Bitter
C. Sour
D. Salty

2. Bases taste:
A. Sweet
B. Bitter
C. Sour
D. Salty

3. Acids turn blue litmus paper:
A. Green
B. Yellow
C. Red
D. Blue

4. Bases turn red litmus paper:
A. Blue
B. Yellow
C. Green
D. Red

5. Neutral solution has pH:
A. 0
B. 7
C. 10
D. 14

6. pH less than 7 indicates:
A. Neutral solution
B. Basic solution
C. Acidic solution
D. Salt solution

7. pH greater than 7 indicates:
A. Acidic solution
B. Basic solution
C. Neutral solution
D. Salt solution

8. Acids are usually:
A. Slippery
B. Sour
C. Bitter
D. Soapy

9. Bases feel:
A. Rough
B. Slippery
C. Dry
D. Sticky

10. Acids react with bases to form:
A. Salt only
B. Water only
C. Salt and water
D. Gas and water

11. Litmus is obtained from:
A. Plants
B. Lichens
C. Animals
D. Bacteria

12. Phenolphthalein in basic medium becomes:
A. Colourless
B. Red
C. Magenta
D. Blue

13. Phenolphthalein in acidic medium is:
A. Colourless
B. Yellow
C. Pink
D. Green

14. Methyl orange in acidic medium becomes:
A. Yellow
B. Red
C. Blue
D. Green

15. Methyl orange in basic medium becomes:
A. Red
B. Pink
C. Yellow
D. Purple

16. Turmeric turns red in:
A. Acid
B. Base
C. Neutral
D. Salt

17. China rose indicator in acid gives:
A. Green
B. Yellow
C. Magenta
D. Blue

18. China rose indicator in base gives:
A. Green
B. Red
C. Pink
D. Orange

19. An indicator changes colour to show:
A. Temperature
B. Density
C. Acidic or basic nature
D. Volume

20. Blue litmus in neutral solution becomes:
A. Red
B. Blue
C. Green
D. Yellow

21. Acids react with metals to produce:
A. Salt and oxygen
B. Salt and hydrogen gas
C. Salt and nitrogen
D. Water and oxygen

22. HCl + Mg → produces:
A. MgO + H₂
B. MgCl₂ + H₂
C. Mg + H₂O
D. MgCl + O₂

23. Hydrogen gas gives a:
A. Pop sound
B. Whistle sound
C. Crack sound
D. No sound

24. Less reactive metals like copper react with dilute acids:
A. Always
B. Never
C. Sometimes
D. Slowly

25. The reaction between acid and base is called:
A. Combustion
B. Neutralisation
C. Oxidation
D. Reduction

26. Neutralisation produces:
A. Salt and water
B. Gas and water
C. Salt only
D. Water only

27. Heat is produced when:
A. Base mixes with oil
B. Acid mixes with water
C. Salt mixes with water
D. Metal mixes with water

28. While diluting acid we should:
A. Add water to acid
B. Add acid to water
C. Mix quickly
D. Heat first

29. Acids are stored in:
A. Metal containers
B. Plastic containers
C. Glass containers
D. Wooden containers

30. Acids are:
A. Corrosive
B. Soft
C. Sweet
D. Colourful

31. Gastric juice contains:
A. Sulphuric acid
B. Hydrochloric acid
C. Nitric acid
D. Acetic acid

32. Vinegar contains:
A. Citric acid
B. Acetic acid
C. Lactic acid
D. Tartaric acid

33. Vitamin C is:
A. Citric acid
B. Ascorbic acid
C. Carbonic acid
D. Oxalic acid

34. Sulphuric acid is called:
A. Queen of chemicals
B. King of chemicals
C. Prince of chemicals
D. Father of chemicals

35. Sulphuric acid is used in:
A. Batteries
B. Cooking
C. Clothes washing
D. Painting walls

36. Nitric acid is used in:
A. Fertilisers
B. Cooking oil
C. Paper making
D. Soap making

37. Acetic acid is used in:
A. Food preservation
B. Making glass
C. Making cement
D. Making iron

38. Hydrochloric acid removes:
A. Dust
B. Rust
C. Paint
D. Ink

39. Nitric acid is used in rocket:
A. Fuel
B. Paint
C. Ink
D. Soap

40. Organic acids contain:
A. Oxygen only
B. Carbon and hydrogen
C. Nitrogen
D. Metals

41. Bases feel:
A. Sticky
B. Slippery
C. Rough
D. Hard

42. Water-soluble bases are called:
A. Salts
B. Acids
C. Alkalis
D. Metals

43. Sodium hydroxide is called:
A. Caustic potash
B. Caustic soda
C. Slaked lime
D. Milk of magnesia

44. Potassium hydroxide is called:
A. Caustic potash
B. Washing soda
C. Baking soda
D. Lime water

45. Calcium hydroxide is called:
A. Lime water
B. Slaked lime
C. Milk of magnesia
D. Washing soda

46. Magnesium hydroxide is:
A. Baking soda
B. Milk of magnesia
C. Washing soda
D. Bleaching powder

47. Ammonium hydroxide is used in:
A. Cooking
B. Household cleaners
C. Fuel
D. Glass making

48. Sodium hydroxide is used in:
A. Making soaps
B. Cooking
C. Painting
D. Farming

49. Slaked lime is used in:
A. Whitewashing
B. Cooking
C. Painting nails
D. Medicine

50. Strong bases are:
A. Non-corrosive
B. Corrosive
C. Sweet
D. Soft

51. Salt is formed by reaction of:
A. Acid + Metal
B. Acid + Base
C. Base + Metal
D. Salt + Water

52. Common salt is:
A. Na₂CO₃
B. NaCl
C. NaOH
D. HCl

53. Washing soda is:
A. Sodium carbonate
B. Sodium chloride
C. Sodium hydroxide
D. Potassium chloride

54. Baking soda is:
A. Sodium carbonate
B. Sodium bicarbonate
C. Calcium carbonate
D. Magnesium carbonate

55. Toothpaste prevents tooth decay by:
A. Adding acid
B. Neutralising acid
C. Adding sugar
D. Adding salt

56. Antacids neutralise:
A. Base in stomach
B. Acid in stomach
C. Salt in stomach
D. Water in stomach

57. Acidic soil is treated with:
A. Vinegar
B. Slaked lime
C. Salt
D. Sugar

58. Basic soil is treated with:
A. Acidic manure
B. Salt
C. Sugar
D. Oil

59. Factory wastes are treated with bases to:
A. Colour water
B. Neutralise acid
C. Heat water
D. Make salt

60. Most salts are:
A. Insoluble in water
B. Soluble in water
C. Liquid
D. Gases

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