Changes around us Worksheet-6

Changes around us Worksheet-6

Multiple-Choice Question:

1. Butter melts when it is warmed. What type of change is it?

(A) A chemical change                    (B) A physical change

(C) None of these

2. When vinegar and bicarbonate of soda are mixed, they produce a gas. It is:

(A) None of these                            (B) A chemical change

(C) A physical change

3. Clay gets hard when it is heated. It is a/an:

(A) None of these                            (B) Reversible change

(C) Irreversible change

4. When water is cooled, it turns into ice.

(A) It is a chemical change             (B) It is a physical change

(C) None of these

5. When water is warmed, it evaporates. It is a/an ________ change.

(A) Reversible      (B) Irreversible    (C) None of these

6. When plaster of paris is mixed with water, it gets hard. Is it a physical change?

(A) Yes                 (B) No                  (C) No, it’s a chemical change

7. Biscuit mix gets hard when it is heated.

(A) It is a chemical change             (B) It is a physical change

(C) None of these

8. When water is heated strongly, it boils.

(A) This is a physical and irreversible change

(B) This is a chemical and reversible change

(C) This is a physical and reversible change

(D) This is a chemical and irreversible change

9. When bread is baked, it gets crispy. Which change is it?

(A) None of these

(B) A chemical change

(C) A physical change

10. When chocolate is frozen, it gets hard.

(A) This is a chemical and reversible change

(B) This is a physical and irreversible change

(C) This is a chemical and irreversible change

(D) This is a physical and reversible change

Answer Key:

1. (B)
2. (B)
3. (C)
4. (B)
5. (A)
6. (C)
7. (A)
8. (C)
9. (B)
10. (D)