Class 7 Science
Chapter 6: Physical and Chemical Changes
MCQs and Practice Worksheet
Part A: Multiple Choice Questions (MCQs)
Q1. Which of the following is a physical change?
A. Burning of paper
B. Rusting of iron
C. Melting of ice
D. Cooking of food
Answer: C
Q2. In which change is a new substance formed?
A. Physical change
B. Chemical change
C. Temporary change
D. Shape change
Answer: B
Q3. Rusting of iron is an example of:
A. Physical change
B. Chemical change
C. Reversible change
D. Temporary change
Answer: B
Q4. Which two things are necessary for rusting?
A. Heat and light
B. Oxygen and water
C. Water and salt
D. Air and oil
Answer: B
Q5. Which method can prevent rusting?
A. Heating
B. Painting
C. Cooling
D. Cutting
Answer: B
Q6. Which of the following is a chemical change?
A. Breaking glass
B. Melting wax
C. Burning candle
D. Dissolving sugar
Answer: C
Part B: Practice Worksheet
1. Fill in the blanks:
- In a physical change, no __________ substance is formed.
- Rusting of iron is a __________ change.
- Painting prevents __________ of iron.
- Melting of ice is a __________ change.
2. Very Short Answer:
(a) Name one physical change.
(b) Name one chemical change.
(c) What is rust?
3. Short Answer:
(a) What is a physical change?
(b) What is a chemical change?
(c) Write two methods to prevent rusting.
4. Long Answer:
Explain rusting of iron and how it can be prevented.
Answer Key (For Teachers & Parents)
Fill in the blanks:
- New
- Chemical
- Rusting
- Physical
Very Short Answers:
- Melting of ice
- Burning of paper
- Rust is a reddish-brown substance formed on iron
Shaktimatha CBSE Learning
Class 7 Science – Chapter 6: MCQs & Worksheet
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