Question

ous 1)

a) iron sulphide is a compound or mixture. justify this statement by giving two reason

b) smoke and fog is aerosol . how do they differ from each other?

Answer 1

1.Iron sulphide is a compound.Iron is a metal, while sulfur is a nonmetal. When these two are heated together, the iron atoms combine with the sulfur atoms to make a compoundknown as iron sulphide.
2.Aerosol: An aerosol is a colloid in which a solid or liquid is dispersed in a gas (including air). Smoke and fogboth are aerosols but their dispersed phase is different. The dispersed phase in fog is liquid (water droplets) whereas the dispersed phase in smokeis solid (particulate matter).

Answer 2

1) Iron sulphide is compound because they form by reacting each other ( it is ionic bond)

2) Fog is a form of water and not harmful but smoke is form of poisonous gases which cause pollution and harmful also