Question

An ore of on treatment with dilute Hydrochloric acid produces brisk effervescent. what type of ore is this? What step will be required to obtain metal from enriched ore

Answer 1

It must be a carbonate ore because the reaction is releasing carbon di oxide.

Reaction which takes place, ZnCO3 + HCl - 2ZnCl2 + H2O + CO2

Let us take an example of calcinating zinc calamine(ZnCO3)

First of all,

It is calcinated with insufficient oxygen

ZnCO3 - ZnO + CO2

Thn,

The ZnO obtained is reduced using carbon in form of coke.

ZnO + C - Zn + CO

Answer 2

The type of ore is "Carbonate Ore"

Steps required to obtain pure metal from this are:

1)Calcination, to obtain oxide of the metal.

2)Reduction,reacting the oxide of the metal with carbon monoxide.

3)thus pure metal will be obtained.

For Example:

Consider the ore to be zinc Carbonate.

Steps for obtaining pure metal:

1)zinc carbonate ---(heated in absence----Zinc Oxide + carbon dioxide

of oxygen)

2) zinc oxide + carbon monoxide -------- Zinc + carbon dioxide

(pure metal)