Question

a physical change. Do you agree? Give reasons.
Give one example of each to show that when substances are mixed it
may result into chemical or physical change depending on the
conditions.
(3)​

Answer 1

Answer:

When substances are mixed together, it can result either in a physical change or a chemical change. Example: If iron and sulphur are mixed, no chemical change occurs. But when the mixture is heated, it glows after some time and a black substance is formed which is different from iron and sulphur.