CBSE Class 7 Science Chapter 4 Acids, Bases and Salts MCQ Questions

Explore the world of chemistry with our multiple choice questions on Acids, Bases and Salts for class 7 This chapter covers the properties, uses, and reactions of acids, bases, and salts. Acids Bases and Salts MCQ help reinforce your understanding and prepare you for exams. These MCQ questions cover key topics and ensure you grasp the fundamentals.

Practice with these Class 7 Acids Bases and Salts MCQ questions to build confidence and improve retention. Whether you need MCQ on acids, bases and salts class 7 pdf or multiple choice questions on acids bases and salts pdf, this resource is perfect for mastering the chapter. Get in and excel in your science exams with our comprehensive MCQs.

Science Chapter 4 Acids Bases and Salts Class 7 MCQ 

Here are 50 Multiple Choice Questions on Acids, Bases and Salts for class 7 with answers. These Acids Bases and Salts class 7 MCQ encompass various topics from the chapter, including the properties of acids and bases, their natural sources, and their reactions and applications. 

Each question is crafted to assess your grasp of these essential concepts, offering a thorough understanding of the chemistry involved. This MCQ questions is ideal for students looking to enhance their knowledge and effectively prepare for their exams.

Also Check: NCERT Solutions Class 7 Science Chapter 4 Acids Bases and Salts

Acids Bases and Salts Class 7 MCQ Questions with Answers Exercise

1. What is the taste of curd as described in the chapter?

a) Sweet

b) Sour

c) Bitter

d) Salty

Answer: b) Sour

2. From where is litmus extracted?

a) Turmeric

b) Beetroot

c) Lichens

d) China rose

Answer: c) Lichens

3. When blue litmus paper is dipped in acid, to what color does it change?

a) Blue

b) Yellow

c) Red

d) Green

Answer: c) Red

4. Which of the following is a natural indicator?

a) Phenolphthalein

b) Litmus

c) Methyl orange

d) Bromothymol blue

Answer: b) Litmus

5. What is the nature of baking soda?

a) Acidic

b) Basic

c) Neutral

d) None of the above

Answer: b) Basic

6. Which acid is found in vinegar according to the chapter?

a) Citric acid

b) Lactic acid

c) Acetic acid

d) Tartaric acid

Answer: c) Acetic acid

7. What effect does turmeric have when mixed with a basic solution?

a) It turns pink

b) It turns red

c) It turns yellow

d) It turns blue

Answer: b) It turns red

Also Check: CBSE Class 7 Science Syllabus

8. Which base is found in window cleaner?

a) Sodium hydroxide

b) Ammonium hydroxide

c) Magnesium hydroxide

d) Calcium hydroxide

Answer: b) Ammonium hydroxide

9. What is the effect of adding acidic solution to China rose indicator?

a) Turns yellow

b) Turns magenta

c) Turns blue

d) Turns green

Answer: b) Turns magenta

10. What is the primary use of sodium hydroxide?

a) Used in baking

b) Used in cleaning

c) Used in medicine

d) Used in agriculture

Answer: b) Used in cleaning

11. Which acid is involved in an ant bite?

a) Lactic acid

b) Hydrochloric acid

c) Formic acid

d) Citric acid

Answer: c) Formic acid

12. What does the neutralisation process produce?

a) Acid only

b) Base only

c) Salt and water

d) Water only

Answer: c) Salt and water

13. What turns red litmus paper blue?

a) Acid

b) Salt

c) Water

d) Base

Answer: d) Base

14. Which of the following is not a natural acid as mentioned in the chapter?

a) Citric acid

b) Ascorbic acid

c) Hydrochloric acid

d) Tartaric acid

Answer: c) Hydrochloric acid

15. Which substance is used to treat indigestion according to the chapter?

a) Baking soda

b) Lime water

c) Milk of magnesia

d) Common salt

Answer: c) Milk of magnesia

16. What is the primary component of antacid?

a) Magnesium hydroxide

b) Sodium hydroxide

c) Calcium hydroxide

d) Ammonium hydroxide

Answer: a) Magnesium hydroxide

17. What color does turmeric turn when it contacts a basic substance?

a) Red

b) Blue

c) Yellow

d) Green

Answer: a) Red

18. Which substance is used to neutralize acidic soil?

a) Baking soda

b) Quick lime

c) Vinegar

d) Ammonium hydroxide

Answer: b) Quick lime

19. Which of the following is a basic substance used to treat acidic soil?

a) Sodium chloride

b) Calcium hydroxide

c) Sodium hydroxide

d) Magnesium hydroxide

Answer: b) Calcium hydroxide

20. What color does phenolphthalein turn in a basic solution?

a) Red

b) Blue

c) Pink

d) Colorless

Answer: c) Pink

21. What is the nature of lime water?

a) Acidic

b) Basic

c) Neutral

d) None of the above

Answer: b) Basic

22. What is formed when an acid reacts with a base?

a) Salt and water

b) Acid only

c) Base only

d) Acid and base

Answer: a) Salt and water

23. What is the chemical nature of substances that taste bitter and feel soapy?

a) Acidic

b) Basic

c) Neutral

d) Salty

Answer: b) Basic

24. Which natural indicator is obtained from lichens?

a) Turmeric

b) Litmus

c) China rose

d) Beetroot

Answer: b) Litmus

25. What is the effect of China rose indicator on a basic solution?

a) Turns yellow

b) Turns green

c) Turns pink

d) Turns red

Answer: b) Turns green

26. What is the chemical formula for hydrochloric acid?

a) H2SO4

b) HNO3

c) HCl

d) CH3COOH

Answer: c) HCl

27. Which of the following is a neutral solution?

a) Lemon juice

b) Milk of magnesia

c) Distilled water

d) Vinegar

Answer: c) Distilled water

28. Which substance is used as an antacid?

a) Calcium hydroxide

b) Magnesium hydroxide

c) Sodium hydroxide

d) Potassium hydroxide

Answer: b) Magnesium hydroxide

29. What happens when an acid reacts with a metal?

a) Salt and hydrogen gas are formed

b) Water and hydrogen gas are formed

c) Base and hydrogen gas are formed

d) Salt and water are formed

Answer: a) Salt and hydrogen gas are formed

30. What is the main component of vinegar?

a) Citric acid

b) Lactic acid

c) Acetic acid

d) Tartaric acid

Answer: c) Acetic acid

31. What does a base produce when dissolved in water?

a) Hydrogen ions

b) Hydroxide ions

c) Chloride ions

d) Sulfate ions

Answer: b) Hydroxide ions

32. Which acid is present in lemons?

a) Acetic acid

b) Formic acid

c) Citric acid

d) Tartaric acid

Answer: c) Citric acid

33. Which base is used in the preparation of soap?

a) Sodium hydroxide

b) Calcium hydroxide

c) Ammonium hydroxide

d) Magnesium hydroxide

Answer: a) Sodium hydroxide

34. What is the effect of adding a base to turmeric paper?

a) No change

b) Turns red

c) Turns blue

d) Turns yellow

Answer: b) Turns red

35. What type of acid is found in the stomach?

a) Sulfuric acid

b) Nitric acid

c) Hydrochloric acid

d) Acetic acid

Answer: c) Hydrochloric acid

36. What does an acid produce when dissolved in water?

a) Hydroxide ions

b) Hydrogen ions

c) Chloride ions

d) Sulfate ions

Answer: b) Hydrogen ions

37. Which of the following is a common property of all acids?

a) Bitter taste

b) Soapy feel

c) Sour taste

d) No taste

Answer: c) Sour taste

38. What is the chemical nature of soap?

a) Acidic

b) Basic

c) Neutral

d) Salty

Answer: b) Basic

39. Which acid is found in tamarind?

a) Acetic acid

b) Citric acid

c) Tartaric acid

d) Lactic acid

Answer: c) Tartaric acid

40. Which substance is used to neutralize the acidic effect of an ant bite?

a) Lemon juice

b) Vinegar

c) Baking soda

d) Sugar solution

Answer: c) Baking soda

41. What is the effect of an acid on blue litmus paper?

a) Turns red

b) Turns blue

c) Turns yellow

d) No change

Answer: a) Turns red

42. Which of the following solutions is neutral?

a) Vinegar

b) Lemon juice

c) Milk of magnesia

d) Sugar solution

Answer: d) Sugar solution

43. Which base is found in milk of magnesia?

a) Sodium hydroxide

b) Ammonium hydroxide

c) Magnesium hydroxide

d) Calcium hydroxide

Answer: c) Magnesium hydroxide

44. What is the chemical nature of lime water?

a) Acidic

b) Basic

c) Neutral

d) None of the above

Answer: b) Basic

45. What is the color of phenolphthalein in acidic solution?

a) Red

b) Blue

c) Pink

d) Colorless

Answer: d) Colorless

46. Which substance is used to neutralize factory waste before disposing it into water bodies?

a) Acid

b) Base

c) Salt

d) Water

Answer: b) Base

47. Which acid is found in oranges?

a) Acetic acid

b) Formic acid

c) Citric acid

d) Tartaric acid

Answer: c) Citric acid

48. Which indicator turns red in an acidic solution and blue in a basic solution?

a) Litmus

b) Phenolphthalein

c) Methyl orange

d) Turmeric

Answer: a) Litmus

49. Which of the following is used to treat basic soil?

a) Quick lime

b) Organic matter (compost)

c) Baking soda

d) Ammonium hydroxide

Answer: b) Organic matter (compost)

50. Which acid is found in spinach?

a) Acetic acid

b) Formic acid

c) Oxalic acid

d) Tartaric acid

Answer: c) Oxalic acid