Answer:
1 ) A change in color of substance
2) The given statement is false.
3) A burning of candle is a chemical change.
Step-by-step explanation:
A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.
Example : Melting of ice
Physical property is defined as the property which can be measured and whose value describes the state of physical system. For Example: State, density etc.
A chemical change is defined as a change in which a change in chemical composition takes place. A new substance is formed in these reactions.
Example: Corrosion of iron called as rusting.
Chemical property is defined as the property of a substance which is observed during a reaction where the chemical composition identity of the substance gets changed.
Precipitate is solid substance formed from the mixing of two different solutions.