Question

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Answer 1

Answer:

Cinnabar ore is mined in its concentrated form.

It is crushed in a cone crusher.

Powdered form of the ore is heated at 300 degree Celcius.

Roasting process is carried out, where combustion reaction occurs in the presence of oxygen.

Explanation:

answer of question 18

Answer 2

16)what are decomposition reactions ???give an example for thermal, photolytic and electrolytic decomposition reaction ??

ans :::::) into two or more fragments. Chemical decomposition is usually regarded and defined as the exact opposite of chemical synthesis. In short, the chemical in which two or more products are formed from a single reactant is called a decomposition reaction.

1) thermal decomposition: CaCO3 heat = CaO +CO2. 2) electrolytic decomposition: 2h2o electrolysis = 2H2 + O2. 3) photo decomposition: AgCl sunlight = Ag +Cl2.

18)write the steps involved in extraction of mercury??

ans :::::) answer attached