Question Paper
Class / Subject: Class 9 (SSC) · Science and Technology (विज्ञान आणि तंत्रज्ञान)
Chapter: Chapter 5 — Chapter 5: Acids, Bases and Salts
Time Allowed: 32 minutes
Max Marks: 16
1. What ions do acids release in water? [1]
(A) Hydrogen ions (H+)
(B) Hydroxide ions (OH-)
(C) No ions
(D) Only oxygen ions
2. What taste do acids have? [1]
(A) Sour
(B) Bitter
(C) Sweet
(D) Salty
3. What ions do bases release in water? [1]
(A) Hydroxide ions (OH-)
(B) Hydrogen ions (H+)
(C) No ions
(D) Only oxygen ions
4. What taste do bases have? [1]
(A) Bitter
(B) Sour
(C) Sweet
(D) Salty
5. What forms when acid reacts with base? [1]
(A) Salt and water
(B) Only salt
(C) Only water
(D) Neither
6. What is this reaction called? [1]
(A) Neutralisation
(B) Oxidation
(C) Reduction
(D) Combustion
7. What does the pH scale measure? [1]
(A) Acidity or basicity
(B) Only temperature
(C) Only colour
(D) Only weight
8. What does litmus paper help identify? [1]
(A) A substance's acidic or basic nature
(B) Only its colour
(C) Only its weight
(D) Only its temperature
9. What ions do acids release in water? [1]
(A) Hydrogen ions (H+)
(B) Hydroxide ions (OH-)
(C) No ions
(D) Only oxygen ions
10. What taste do acids have? [1]
(A) Sour
(B) Bitter
(C) Sweet
(D) Salty
11. What ions do bases release in water? [1]
(A) Hydroxide ions (OH-)
(B) Hydrogen ions (H+)
(C) No ions
(D) Only oxygen ions
12. What taste do bases have? [1]
(A) Bitter
(B) Sour
(C) Sweet
(D) Salty
13. What forms when acid reacts with base? [1]
(A) Salt and water
(B) Only salt
(C) Only water
(D) Neither
14. What is this reaction called? [1]
(A) Neutralisation
(B) Oxidation
(C) Reduction
(D) Combustion
15. What does the pH scale measure? [1]
(A) Acidity or basicity
(B) Only temperature
(C) Only colour
(D) Only weight
16. What does litmus paper help identify? [1]
(A) A substance's acidic or basic nature
(B) Only its colour
(C) Only its weight
(D) Only its temperature