Question Paper
Class / Subject: Class 8 (SSC) · Science (सामान्य विज्ञान)
Chapter: Chapter 12 — Chapter 12: Introduction to Acid and Base
Time Allowed: 32 minutes
Max Marks: 16
1. What taste do acids have? [1]
(A) Sour
(B) Bitter
(C) Sweet
(D) Salty
2. What colour change do acids cause in blue litmus? [1]
(A) Turns it red
(B) Turns it blue
(C) No change
(D) Turns it green
3. What ions do acids release in water? [1]
(A) Hydrogen ions (H+)
(B) Hydroxide ions (OH-)
(C) No ions
(D) Only oxygen ions
4. What taste do bases have? [1]
(A) Bitter
(B) Sour
(C) Sweet
(D) Salty
5. What ions do bases release in water? [1]
(A) Hydroxide ions (OH-)
(B) Hydrogen ions (H+)
(C) No ions
(D) Only oxygen ions
6. What is the pH scale range? [1]
(A) 0 to 14
(B) 0 to 7
(C) 0 to 100
(D) 1 to 10
7. What pH value is neutral? [1]
(A) 7
(B) 0
(C) 14
(D) 1
8. What happens during neutralisation? [1]
(A) Acid and base form salt and water
(B) Acid and acid react
(C) Base and base react
(D) Nothing happens
9. What taste do acids have? [1]
(A) Sour
(B) Bitter
(C) Sweet
(D) Salty
10. What colour change do acids cause in blue litmus? [1]
(A) Turns it red
(B) Turns it blue
(C) No change
(D) Turns it green
11. What ions do acids release in water? [1]
(A) Hydrogen ions (H+)
(B) Hydroxide ions (OH-)
(C) No ions
(D) Only oxygen ions
12. What taste do bases have? [1]
(A) Bitter
(B) Sour
(C) Sweet
(D) Salty
13. What ions do bases release in water? [1]
(A) Hydroxide ions (OH-)
(B) Hydrogen ions (H+)
(C) No ions
(D) Only oxygen ions
14. What is the pH scale range? [1]
(A) 0 to 14
(B) 0 to 7
(C) 0 to 100
(D) 1 to 10
15. What pH value is neutral? [1]
(A) 7
(B) 0
(C) 14
(D) 1
16. What happens during neutralisation? [1]
(A) Acid and base form salt and water
(B) Acid and acid react
(C) Base and base react
(D) Nothing happens