Question

1. Write the steps involved in writing the chemical formula of calcium phosphate.

2. How is a chemical change different from a physical change?

3. Neutralisation reaction is a chemical change.' Justify this statement with the help of an example.

4. Define a decomposition reaction and give an example of the same.

5. Classify the following reactions into different types, giving reason.
(a) CaO(s) + SiO2(g)----Casio(s)
(b) KOH(aq) + HCl(aq)---- KCl(aq)H.O(1)
(c) Cu(s) + 2AgNO3 (aq)---- Cu(NO)(aq) + 2Ag(s)
(d) BaCO3(s)------- BaO(s) + CO,(g)heat​

Answer 1

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