Select homogeneous and heterogeneous mixtures from the following:

Salt solution, petrol and water, sand and charcoal, alcohol and water, air dissolved in water, air, sea water, fruit juices, mist, brass.

Select the odd one out from the following:

(a) Salt solution, sugar solution, water and alcohol, sand and water

(b) Chalk and sand, water and petrol, iron and sulphur, salt and water

(c) Gold, iron sulphide, milk, water

Name the components present in the following mixtures:

(a) Brass

(b) Duralumin

(c) Tap water

(d) Bronze

Define the following with an example for each:

(a) Pure substance

(b) Impure substance

(c) Alloy

(d) Solution

(e) Heterogeneous mixture

(f) Homogeneous mixture