Question Paper
Class / Subject: Class 6 (ICSE) · Science
Chapter: Chapter 11 — Chapter 11: Pure Substances and Mixtures
Time Allowed: 32 minutes
Max Marks: 16
1. What is a pure substance? [1]
(A) A substance with fixed composition
(B) A combination of substances
(C) A type of force
(D) A type of mixture
2. What is an example of a pure substance? [1]
(A) Gold
(B) Salad
(C) Saltwater
(D) Sand and salt
3. What is a mixture? [1]
(A) A combination of substances without bonding
(B) A single element
(C) A pure compound
(D) A type of force
4. What is an example of a mixture? [1]
(A) Salad
(B) Gold
(C) Pure water
(D) Oxygen gas
5. What is a homogeneous mixture? [1]
(A) A uniform mixture, like saltwater
(B) A non-uniform mixture
(C) A pure substance
(D) A type of compound
6. What is a heterogeneous mixture? [1]
(A) A non-uniform mixture, like salad
(B) A uniform mixture
(C) A pure substance
(D) A type of element
7. How can mixtures be separated? [1]
(A) Physical methods like filtration
(B) They cannot be separated
(C) Only by burning
(D) Only by melting
8. Why can mixtures be separated easily? [1]
(A) Substances aren't chemically combined
(B) They are chemically bonded
(C) No reason
(D) Separation is always impossible
9. What is a pure substance? [1]
(A) A substance with fixed composition
(B) A combination of substances
(C) A type of force
(D) A type of mixture
10. What is an example of a pure substance? [1]
(A) Gold
(B) Salad
(C) Saltwater
(D) Sand and salt
11. What is a mixture? [1]
(A) A combination of substances without bonding
(B) A single element
(C) A pure compound
(D) A type of force
12. What is an example of a mixture? [1]
(A) Salad
(B) Gold
(C) Pure water
(D) Oxygen gas
13. What is a homogeneous mixture? [1]
(A) A uniform mixture, like saltwater
(B) A non-uniform mixture
(C) A pure substance
(D) A type of compound
14. What is a heterogeneous mixture? [1]
(A) A non-uniform mixture, like salad
(B) A uniform mixture
(C) A pure substance
(D) A type of element
15. How can mixtures be separated? [1]
(A) Physical methods like filtration
(B) They cannot be separated
(C) Only by burning
(D) Only by melting
16. Why can mixtures be separated easily? [1]
(A) Substances aren't chemically combined
(B) They are chemically bonded
(C) No reason
(D) Separation is always impossible