Class10th Chemistry Chapter 8


Total Marks: 12

1. The naturally occurring metallic compounds are
Acids Bases Minerals All of these
2. The process of separating a metal from its ore is known as
Kinetic Energy Potential Energy Internal Energy Metallurgy
3. To remove a mineral from magnetic ore,------ is used.
Iron Magnet Copper Tungsten
4. The process of converting a mineral to an oxide below its melting point is known as
Crystallization Hydration Roasting Solvation
5. The method used to reduce metal ions to free metal is :
Smelting Roasting Concentration Solubility
6. The purity of blister copper is about ---- %.
67-78.8 97-99 34-59 88-92
7. In electrolytic refining which type of cell is used?
Voltaic Galvanic Electrolytic All of these
8. In electrolytic refining impure metal acts as
Cathode Anode Both None of the above
9. In electrolytic refining sample of pure metal acts
Cathode Anode Both None of the above
10. Low melting point metals are refined by
Sublimation Evaporation Distillation None of these
11. Concentrated sodium chloride solution is known
Salt Water Chloroform Brine
12. Which of the following is a synthetic fertilizer
Urea Copper Iron Silver