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Materials metals and non-metals — Science STD 8 — Question

Maharashtra BoardEnglish MediumSTD 8ScienceMaterials metals and non-metals5 Marks
Question
State five uses of metals and five uses of non-metals.
✓

Answer

The five uses of metals are given below:
  1. Used for making machinery and heavy equipment. Ex - Iron.
  2. Used in making electric wires because it is a good conductor of electricity. Ex- copper
  3. Used to make thin foils for packaging medicines, chocolate, and food items. This is because it provides a complete barrier to light, oxygen, moisture, and bacteria.
  4. Used in the manufacture of many products such as paints, rubber, cosmetics, pharmaceuticals, plastics, inks, soaps, batteries, textiles and electrical equipment.
  5. Mercury is a liquid metal and is used for making thermometers. It is liquid at room temperature and is a very good conductor of heat.
The five uses of non-metals are given below:
  1. Used for making fire crackers.
  2. Oxygen is an essential non-metal for life. It helps in maintaining life and is inhaled during breathing.
  3. Chlorine is used in water purification process to make drinking water supply germfree. Chlorine kills pathogens such as bacteria and viruses by breaking the chemical bonds in their molecules.
  4. Iodine is a non-metal. It is used to make purple coloured solution which is applied on cuts and wounds as an antiseptic.
  5. Nitrogen is also a non-metal is used to make fertilizers and explosives.

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