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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 5 Acids Bases and Salts Class 7 MCQ with Answers
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.
Acids Bases and Salts Class 7 MCQ Questions with Answers
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. What color does blue litmus paper turn when dipped in acid?
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 as described in the chapter?
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
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
CBSE Science Chapter 5 Acids Bases and Salts Class 7 MCQ FAQs
What is an acid?
An acid is a substance that tastes sour and turns blue litmus paper red.
What is a base?
A base is a substance that feels slippery, tastes bitter, and turns red litmus paper blue.
What are salts in chemistry?
Salts are compounds formed when acids react with bases, resulting in neutralization.
What is the pH scale?
The pH scale measures the acidity or basicity of a solution, ranging from 0 to 14.
What happens in a neutralization reaction?
In neutralization, an acid reacts with a base to form salt and water.
What is the litmus test used for?
The litmus test identifies whether a substance is acidic or basic using litmus paper.
Give an example of an acid commonly found at home.
Lemon juice contains citric acid, a common household acid.
Can bases also be harmful?
Yes, strong bases like sodium hydroxide can cause burns and must be handled carefully.
How do acids and bases affect plant growth?
The pH of soil affects plant growth, with most plants preferring slightly acidic or neutral soil.
Are all salts edible?
No, not all salts are safe to eat. Table salt (sodium chloride) is edible, but other salts may not be.
