Question

Which of the following is not an example for a physical change?

A Evaporation of water
B Dissolution of sugar
C Burning of a candle
D Melting of candle wax​

Answer 1

$\huge\bigstar\underline\mathfrak{Answer:-}$

D) Melting of candle wax

Explanation;

A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding.

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Answer 2

Answer:

Burning of A candle

Explanation:

Burning is a chemical change that involves oxidation thus producing heat and light. When a candle is burnt in air, the mass of the product is increased due to atmospheric oxygen which combines with the carbon and hydrogen of the candle wax during burning to produce water vapour and carbon dioxide. Also, the original properties of the reactants are altered. All these factors prove that the burning of a candle is a chemical change.