Magnetic Separation

Q. <!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Explain the magnetic separation method.

Q. An iron ore can be concentrated by using magnetic seperation technique.

1. True
2. False

Q. Which ore is used in magnetic separation method?

Q. Which of the following statements is true about magnetic separation?

1. It is used when only ores are magnetic in nature.
2. It is used when only impurities are magnetic in nature
3. It is used when both ores and impurities are magnetic in nature.
4. It is used when either ore or impurities are magnetic in nature.

Q. Magnetite ore can be concentrated using magnetic separation.

1. True
2. False

Q. Which method for the concentration of ore is depicted below?

1. Froth floatation
2. Magnetic separation
3. Gravity separation
4. Washing

Q. Iron can be concentrated from iron ore using electromagnetic separation.

1. False

2. True

Q.

Gangue particles can be removed from cassiterite ore by the process of _______.

1. calcination

2. roasting

3. gravity separation

4. magnetic separation

Q.

What are the leaching methods for the extraction of minerals from ores?

Q. Which of the following method is used for the concentration of bauxite ore?

1. Froth floatation
2. Levigation
3. Magnetic seperation
4. Leaching

Q.

1. True
2. False

Q. Magnetic separation is used when both ore as well as impurities are magnetic in nature.

1. True
2. False

Q. Magnetic separation is used when both ore as well as impurities are magnetic in nature.

1. True
2. False

Q. The formula of Haematite is:

1. $F{e}_3{O}_4$
2. $Fe{O}_4$
3. $F{e}_2{O}_3$
4. $F{e}_3{O}_2$

Q.

Which of the following processes is not a physical process of concentrating an ore?

1. Levigation

2. Magnetic separation

3. Leaching

4. Froth floatation

Q. _____ is used to treat bauxite ore during leaching.

1. HCl​
2. KCl​
3. NaCl​
4. NaOH​

Q. Magnetic ores can be easily separated by gravity separation method.

1. True
2. False

Q.

Gravity separation is generally applicable for heavier ores such as $F{e}_2{O}_3$ and $Sn{O}_2$.

1. True

2. False

Q. In the extraction of iron from haematite, the charge used is haematite, coke and lime stone in the following weight ratio.

1. $1:4:8$
2. $1:1:1$
3. $8:1:4$
4. $8:4:1$

Q. Gravity separation is based on the difference in the ____ of the ore and the gangue particles.

1. solubility
2. density
3. texture
4. magnetic properties

Q. Rusting of an iron nail is _____________ reaction.

1. Combination
2. displacement
3. double displacement
4. decomposition

Q. Magnetic separation is suitable for which one of the following ores?

1. Cassiterite
2. Galena
3. Cinnabar
4. Zinc blende

Q. The chemical method used in the concentration of ore is also known as:

1. Leaching
2. Bleaching
3. Roasting
4. Calcination

Q. Halide ores are seen for:

1. sodium
2. calcium
3. both $A$ and $B$
4. none of the above

Q.

Q.

In the process of extraction of iron from iron pyrite ore, which of the following process is/are used for concentration of ore?

1. Magnetic separation.
2. Gravity separation.
3. Froth flotation.
4. Leaching.

Q. Iron is not extracted from iron pyrites.-------- explain the reason