iGCSE Chemistry Multiple Choice (Extended) : 6.1 Physical and chemical changes: Exam Style Questions Paper 2

Question

Which process involves a physical change only?

A) heating calcium carbonate strongly
B) burning wood
C) melting an ice cube
D) mixing an acid and a base

▶️ Answer/Explanation

Solution

Ans: C

A physical change is one where the substance changes its physical state but not its chemical composition. Melting an ice cube (option C) is simply changing water from solid to liquid state without altering its chemical structure. The other options involve chemical changes: heating calcium carbonate decomposes it into calcium oxide and carbon dioxide (A), burning wood involves combustion (B), and mixing acid and base results in neutralization (D).

Question

Which row identifies a chemical change and a physical change?

Answer/Explanation

Ans:

Question

When sulfur is heated it undergoes a ……1…… change as it melts.
Further heating causes the sulfur to undergo a ……2…… change and form sulfur dioxide.
Which words complete gaps 1 and 2?

Answer/Explanation

Ans: C

Question

X is a pink solid.
Y is a blue solid.
When X is heated, water is produced and the solid turns blue.
When water is added to Y, the solid turns pink.
What are X and Y?

Answer/Explanation

Ans: B

iGCSE Chemistry Multiple Choice (Extended) : 6.1 Physical and chemical changes: Exam Style Questions Paper 2

Question

Question

Question

Resources

Members

Company