1.

Fill in the Blanks:1. …………… is the most abundant metal. 2. …………… is used in packing materials for food items.3. …………… is used in the manufacture of paints, rubber and cosmetics. 4. …………… is the first metal used by the humans. 5. …………… is one of the expensive and precious metals. 6. …………… is used for increasing the efficiency of solar cells and also used as catalysts. 7. …………… ore is concentrated by froth floatation process. 8. Zinc blende is concentrated by …………… process. 9. Gold ore is leached by adding of ……………

Answer»

1. Aluminium 

2. Aluminium foils 

3. Zinc oxide 

4. Copper 

5. Gold 

6. Gold nanoparticle  

7. Sulphide

8. Froth floatation

9. NaCN



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