Introduction to Minerals and Ores

Q.

What is the difference between minerals and ore? Explain it.

Q. The chemical formula of haematite is:

1. $\text{FeO}$
2. ${\text{Fe}}_2{\text{O}}_3$
3. ${\text{Fe}}_3{\text{O}}_4$
4. ${\text{Fe}}_3{\text{O}}_7$

Q. Which is the least reactive metal among the following?

1. Gold
2. Aluminium
3. Iron
4. Zinc

Q. Identify the metals among the following:

1. Sodium
2. Magnesium
3. Aluminium
4. Gold
5. Silver
6. Carbon
7. Oxygen
8. Nitrogen

Q.

In an ore, the gangue particles are highly denser than ore particles. The process used for concentration of the ore is ___.

1. leaching

2. magnetic separation

3. gravity separation

4. froth floatation

Q.

In an ore, the gangue particles are highly denser than ore particles. The process used for concentration of the ore is ___.

1. magnetic separation

2. gravity separation

3. leaching

4. froth floatation

Q. Gravity separation is also called ___ .

1. distillation
2. levitation
3. magnetic seperation
4. levigation