Concentration of Ore

Q.

Which oil is used in the froth floatation process?

Q. An ore is analyzed for manganese content by converting the manganese to Mn3O4 and weighed? -if a 1.52g sample yields Mn3O4 weighing 0.126g (a)what will be percent Mn2O3 in sample? (B)what is the percent of Mn? Gravimetric analysis

Q. 28. Copper forms two oxides. For the same amount of copper, twice as much oxygen was used to form the first oxide than to form the second one. What is the ratio of the Valencies of copper in the first and second oxides?

Q.

Which of the following statements is true in concentration of ore?

1. Gravity separation also called levigation and particularly suitable for heavy oxides and carbonate ores.

2. Froth floatation process is based on solubility and is best suited for sulphide ores.

3. Electromagnetic separation is used when both ore and impurities are magnetic in nature.

4. Crushing and grinding of the ore is the physical method to concentrate the ore.

Q. balance the redox reaction cu_2s + so_4^{2-} → cuo + so_2

Q.

In Metallurgy, which of the following terms are popular methods of concentration?

1. Hand picking

2. Froth Floatation

3. Grinding and Pulverizing

4. Deep meditation

Q. Find the number of compounds that form basic flux from the ones given below:
$Si{O}_2,MgO,CaO,FeO,B_2{O}_3,CaC{O}_3$