1.Explain the term rusting. Give a word reaction.
2.Give five uses of common metals.
3. Give five uses of non-metals.
Answers
Answer:
1.Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Here is the word equation for the reaction: iron + water + oxygen → hydrated iron(III) oxide. Iron and steel rust when they come into contact with water and oxygen.
2.Gold, Platinum and silver are used as jewelleries and ornaments.
Iron and steel are used for construction purpose.
Aluminium, steel are used as utensils.
Mercury is used in thermometer and helps to check the temperature.
Aluminium are used as insulation wires.
3.Oxygen is used for breathing.
Chlorine is used for purifying water.
Phosphorous is used in crackers.
Non - metals like nitrogen is used in fertilizers.
Graphite is used as a good conductor of electricity.
Pottassium is used in fertilizers.
Nitrogen is used by plants.
Explanation:
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