Which of the following are physical changes and which are chemical changes ?

Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper

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Solution

Physical change :– Melting of candle wax, mixing of iron filings and sand, breaking a piece of chalk, cutting a piece of paper.

Chemical change :– Burning of candle wax, burning of wood, burning of piece of paper.

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Similar questions

Give reason:

(a)Freezing of water to ice and evaporation of water are physical changes.

(b)Burning of a candle is both a physical and a chemical change.

(c)Burning of paper is a chemical change.

(d)Cutting of a cloth piece is a physical change, though it cannot be reversed.

Question 1

Which of the following is a physical change?
(a) Rusting of iron
(b) Combustion of magnesium ribbon
(c) Burning of candle
(d) Melting of wax

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