Question

Give Reason.
1. alloys are used in electrical heating devices rather than pure metal.
2. An iron grill should be painted frequently.
3.why does bleaching powder smell strongly of chlorine. And did not dissolve in water.
4. Adrenaline helps in dealing emergency situation.
pls give reason for all.

Answer 1

1..Alloys are used in electrical heating devices as it do not change their resistance on heating at high temperatures.
2..Iron should be painted as the layer if paint prevent it from corrosion .
3..It smell strongly as Cl2 as it is made up of chlorine and it dose not dissolve in water as has covalent bond which is insoluble in water .
4..Adrenaline helps in emergency as it increases heart beat thus supplying more oxygen to our for more energy requirement .

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