Question : Iodine can be separated from a mixture of Iodine and  potassium chloride  by

Option 1: sedimentation

Option 2: Filtration

Option 3: sublimation

Option 4: distillation

Question : A mixture contains alcohol and water in the ratio 4 : 3. If 5 litres of water is added to the mixture, the ratio becomes 4 : 5. The quantity of alcohol in the given mixture is:

Option 1: 3 litres

Option 2: 4 litres

Option 3: 15 litres

Option 4: 10 litres

Question : _______forces water through a semipermeable membrane and removes contaminants.

Option 1: Boiling

Option 2: Distillation

Option 3: Reverse Osmosis

Option 4: Filtration

Question : A mixture of 70 litres of wine and water contains 10% of water. How much water must be added to make the water $12 \frac{1}{2}\%$ of the resulting mixture?

Option 1: 5 litres

Option 2: 3 litres

Option 3: 2 litres

Option 4: 4 litres

Question : A 40-litre mixture of milk and water contains milk and water in the ratio of 7 : 3. How many litres of water should be added to the mixture so that the resulting mixture has 60% water in it?

Option 1: 30

Option 2: 35

Option 3: 20

Option 4: 25