Question

Give reason to show that adding of calcium to water is a chemical change

Answer 1

Adding calcium to water  is chemical change because, it forms calcium hydroxide and hydrogen gas as the products.Here, Calcium is an element, and water is a compound, which results in a new compound.
Therefore, the chemical nature of the reactants changes. Therefore, it is a chemical change.

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Answer 2

Adding calcium to water is a chemical change, because it forms calcium hydroxide and hydrogen gas as the products. Since new products are formed, which have completely different properties from their reactants and heat is also released in the process, we can call it a chemical change.