Question Paper
Class / Subject: Class 8 (ICSE) · Science
Chapter: Chapter 16 — Chapter 16: Water
Time Allowed: 32 minutes
Max Marks: 16
1. What is water's chemical formula? [1]
(A) H2O
(B) H2O2
(C) HO
(D) H3O
2. How many hydrogen atoms are in water? [1]
(A) Two
(B) One
(C) Three
(D) Zero
3. How many oxygen atoms are in water? [1]
(A) One
(B) Two
(C) Three
(D) Zero
4. What does high specific heat capacity mean? [1]
(A) It takes a lot of energy to change temperature
(B) It changes temperature instantly
(C) It has no temperature
(D) It boils immediately
5. Why is water called the 'universal solvent'? [1]
(A) It dissolves many different substances
(B) It dissolves nothing
(C) It's the only liquid on Earth
(D) It has no solvent properties
6. Why is water's solvent ability important? [1]
(A) Essential for biological and chemical processes
(B) It has no importance
(C) Only for cleaning
(D) Only for drinking
7. What three states does water exist in on Earth? [1]
(A) Solid, liquid, gas
(B) Only liquid
(C) Only solid
(D) Only gas
8. Why is water essential for life? [1]
(A) It's needed for biological processes and climate regulation
(B) It has no essential role
(C) Only for drinking, nothing else
(D) It's not important
9. What is water's chemical formula? [1]
(A) H2O
(B) H2O2
(C) HO
(D) H3O
10. How many hydrogen atoms are in water? [1]
(A) Two
(B) One
(C) Three
(D) Zero
11. How many oxygen atoms are in water? [1]
(A) One
(B) Two
(C) Three
(D) Zero
12. What does high specific heat capacity mean? [1]
(A) It takes a lot of energy to change temperature
(B) It changes temperature instantly
(C) It has no temperature
(D) It boils immediately
13. Why is water called the 'universal solvent'? [1]
(A) It dissolves many different substances
(B) It dissolves nothing
(C) It's the only liquid on Earth
(D) It has no solvent properties
14. Why is water's solvent ability important? [1]
(A) Essential for biological and chemical processes
(B) It has no importance
(C) Only for cleaning
(D) Only for drinking
15. What three states does water exist in on Earth? [1]
(A) Solid, liquid, gas
(B) Only liquid
(C) Only solid
(D) Only gas
16. Why is water essential for life? [1]
(A) It's needed for biological processes and climate regulation
(B) It has no essential role
(C) Only for drinking, nothing else
(D) It's not important