Calcination

Q. Calcination does not work for:

1. Calamine
2. Malachite
3. Chalcopyrite
4. Dolomite

Q.

In the extraction of Iron from Haematite Fe₂O₃, the ore is calcinated before smelting – True or False?

1. True

2. False

Q. $2{\text{Fe}}_2{\text{O}}_3.3{\text{H}}_2\text{O(s)}\stackrel{Calcination}{\to }\text{A}+3{\text{H}}_2\text{O(l)}$
Find out $\text{A}$:

1. $2\text{FeO}$
2. $2{\text{Fe}}_3{\text{O}}_4$
3. $2{\text{Fe}}_2{\text{O}}_3$
4. $\text{FeO}.{\text{FeCO}}_3$

Q.

What is the difference between calcination and roasting.

Q. Which one of the following oxidation state is exhibited by group 15 element when they reacts with metals?

1. 0
2. +3
3. -5
4. -3

Q. Which of the following reaction(s) occur during calcination?

1. $CaC{O}_3\to CaO+C{O}_2$
2. $4Fe{S}_2+11O_2\to 2F{e}_2{O}_3+8S{O}_2$
3. $2Al(OH{)}_3\to A{l}_2{O}_3+3H_{2}O$
4. $CuS+CuS{O}_4\to 2Cu+2S{O}_2$