Acids, Bases and Salts Quiz CBSE/Science/Class7
  • 1. Which is not a property of acids?
A) Acids turn blue litmus red.
B) Acids do not change the colour of turmeric indicator.
C) Acids turn red litmus blue.
D) These are sour to taste.
E) With china rose indicator, these give dark pink colour.
  • 2. Which is not a property of bases?
A) Bases do not change the colour of blue litmus.
B) Bases give green colour with china rose indicator.
C) These are bitter to taste.
D) Bases do not change the colour of red litmus.
E) Bases turn the colour of turmeric indicator to red.
  • 3. Ammonia is found in many household products, such as window cleaners. It turns red litmus blue. What is its nature?
A) Neutral
B) Basic
C) None of the above
D) Acidic
  • 4. Name the source from which litmus solution is obtained.
A) Virus
B) Lichens
C) Fungus
D) Acid
E) Base
  • 5. Is the distilled water acidic/basic/neutral?
A) Neutral
B) Acidic
C) None of the above
D) Basic
  • 6. Nitric acid turns red litmus blue.
A) True
B) None of the above
C) False
  • 7. Sodium hydroxide turns blue litmus red.
A) None of the above
B) True
C) False
  • 8. Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water.
A) None of the above
B) False
C) True
  • 9. Indicator is a substance which shows different colours in acidic and basic solutions.
A) True
B) False
C) None of the above
  • 10. Tooth decay is caused by the presence of a base.
A) False
B) None of the above
C) True
  • 11. An antacid tablet contains
A) Base
B) Acid
C) None of the above
  • 12. Milk of magnesia contains
A) Acid
B) None of the above
C) Base
  • 13. Calamine solution is applied on the skin when an ant bites. It is
A) None of the above
B) Basic
C) Acidic
  • 14. Factory wastes contain
A) Bases
B) Acids
C) None of the above
  • 15. Sodium hydroxide is a/an
A) Acid
B) Base
C) None of the above
  • 16. Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution?
A) Either basic or neutral in nature
B) Acidic
C) Basic
D) None of the above
  • 17. Which of these statement is correct?
A) Both acids and bases change colour of all indicators.
B) If an indicator changes colour with a base, it does not change colour with an acid.
C) None of the above
D) Change of colour in an acid and a base depends on the type of the indicator.
E) If an indicator gives a colour change with an acid, it does not give a change with a base.
  • 18. Quiz on Acids, Bases and Salts for CBSE/Science/Class VII Narayana Home School, Nanniode - an online concept school nhsnanniode@gmail.com Type Yes to continue...
A) Yes
B) No
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