Question

GIVE TWO SIGNIFICANCE OF EACH OF THE FOLLOWING METALS AND NON METALS:
1. COPPER
2. LEAD
3. ALUMINIUM
4. CHLORINE
5. IODINE
6. GRAPHITE
GIVE ONE USE OF :
1. BLUE VITRIOL
2. PLASTER OF PARIS

Answer 1

1) Copper vessels and copper wires
2) Battery,Lead pipes,cable covering
3) Aluminium wires,roofing sheets.
4) Disinfectant,Purifier,bleach
5) added to table salt in order to avoid thyroid disease and for printing inks
6) Pencil lead, and used as a dry lubricant.

1) Pescticide
2) used to support broken bones

Answer 2

1. Copper - Copper Alloy and Gun Metal
2. Lead - Batteries and Cable sheaths
3. Aluminium - Kitchen utensils and Window frames
4. Chlorine - Plastic and Dye
5. Iodine - reduces thyroid hormone and can kill fungus, bacteria, and other microorganisms
6. Graphite - pencil and steel industry

Give one use of:
1. Blue Vitriol - insecticides and germicides
2. Plaster of Paris - protective coating on walls and ceilings










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