Question

This my home work I have done till Q2 please solve from 3 till end

Answer 1

Answer:

Hi mate here's your answer.

Explanation:

3) It is due to cupric acid in the copper.

4)Sodium is a very reactive metal. It is kept in kerosene to prevent it from coming in contact with oxygen and moisture. If this happens, it will react with the moisture present in air and form sodium hydroxide which is a highly exothermic reaction.

5) Oxygen for breathing.

Used in fertilizer

6) Metals are very hard whereas Non metals are soft.

7) A single-displacement reaction, is a chemical reaction in which one (or more) element(s) replaces an/other element(s) in a compound

8) It forms zinc sulphate.