Question

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3. Chemical reactions are broadly classified into four types.
4. The chemical formula of ammonia is N.Hg.
5. Copper salts are mostly blue in colour.​

Answer 1

3.) Chemical reactions may be

classified as an acid–base reaction, an exchange reaction, a condensation reaction and its reverse, a cleavage reaction, and an oxidation–reduction (or redox) reaction.

4.)The chemical formula for

ammonia is NH3. It has many names including hydrogen nitride, Nitrosil, and Vaporole. Its molar mass is 17.0306 g/mol.

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Answer 2

Answer:

Chemical reactions are broadly classified into four types.

(i) Combination reaction

ii) Displacement reaction

(iii) Neutralization reaction

iv) DeComposition reaction

The chemical formula of ammonia is NH3

Copper salts are mostly blue in colour.

eg copper sulphate