English Medium Class 9 - CBSE Question Bank Solutions for Science

Name the different types of solutions. Give one example of each.

Classify the following into solutions, suspensions and colloids :

Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.

Classify the following into solutions, suspensions and colloids :

Soda-water, Milk, Brine, Blood, Ink, Smoke in air, Chalk water mixture, Milk of Magnesia, Shaving cream, Muddy river water.

Define Sol and give one example.

Define Sol and give one example.

Define Aerosol Give one example.

Define Aerosol Give one example.

Define the emulsion. Give one example.

Define the emulsion. Give one example.

Define Foam Give one example.

Define Foam Give one example.

What is meant by the concentration of a solution ?

What is meant by the concentration of a solution ?

What will happen if a saturated solution is :

1. heated
2. cooled

What will happen if a saturated solution is :

1. heated
2. cooled

21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.

21.5 g of sodium chloride dissolves in 60 g of water at 25°C. Calculate the solubility of sodium chloride in water at that temperature.

9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.

9.72 g of potassium chloride dissolves in 30 g of water at 70°C. Calculate the solubility of potassium chloride at that temperature.

Which of the following do not exhibit Tyndall effect ?

Starch solution, Sugar solution, Ink, Salt solution, Copper sulphate solution, Ammonium chloride solution, Fog, Smoke, Car exhausts.