Question Paper
Class / Subject: Class 7 (CBSE) · Science
Chapter: Chapter 5 — Chapter 5: Changes Around Us: Physical and Chemical
Time Allowed: 15 minutes
Max Marks: 6
1. Melting ice is an example of a: [1]
(A) physical change
(B) chemical change
(C) neutralisation
(D) deficiency
2. A key feature of most physical changes is that they are: [1]
(A) reversible
(B) always permanent
(C) always dangerous
(D) never observable
3. Dissolving sugar in water is a physical change because: [1]
(A) the sugar remains chemically the same
(B) a new substance forms
(C) it cannot be reversed
(D) it produces gas
4. Rusting of iron is an example of a: [1]
(A) chemical change
(B) physical change
(C) neutralisation only
(D) evaporation
5. A sign that a chemical change has occurred is: [1]
(A) production of gas or a colour change
(B) only a change in shape
(C) only a change in size
(D) no observable change
6. Rust forms when iron reacts with: [1]
(A) oxygen and moisture
(B) only water
(C) only sunlight
(D) only heat