A physical change is a reversible change in which no new substance is formed, while a chemical change is an irreversible change where one or more new substances are formed.
Question : Burning of coal is an example of_________.
Option 1: decomposition reaction
Option 2: double displacement reaction
Option 3: combination reaction
Option 4: displacement reaction
Question : The reaction between an acid and a base to give a salt and water is called______.
Option 1: neutralisation reaction
Option 2: combination reaction
Option 3: displacement reaction
Option 4: decomposition reaction
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