English Medium Class 9 - CBSE Question Bank Solutions for Science

How do solids, liquids and gases differ in shape and volume?

Arrange the following substances in increasing order of force of attraction between their particles (keeping the substance having the minimum force of attraction first) : Water, Sugar, Oxygen

Give two reasons to justify that An iron almirah is a  solid.

Compare the properties of solids, liquids and gases in tabular form.

Give two reasons for saying that wood is a solid.

‘‘The properties of the product are different from those of the constituents''. State whether this statement best describes an element, a compound or a mixture.

What is the major difference between a solution and an ordinary mixture ?

Fill in the following blanks with suitable words :

Brine is a ..............whereas alcohol is a...............

State three reasons why you think air is a mixture and water is a compound.

Compare the properties of metals and non-metals with respect to

1. alleability
2. ductility
3. electrical conductivity.

Choose the solutions from among the following mixtures :

Soil, Sea-water, Air, Coal, Soda-water

Is air a mixture or a compound ? Give three reasons for your answer.

Give two reasons for supposing that water is a compound and not a mixture.

Define a mixture. Give two points of evidence to show that sugar solution is a mixture.

List five characteristics by which compounds can be distinguished form mixtures.

Explain why, a solution of salt in water is considered a mixture and not a compound.

The value of acceleration due to gravity of earth :

State the main points of difference between homogeneous and heterogeneous mixtures.

Classify the following materials as homogeneous mixtures and heterogeneous mixtures :

Soda-water, Wood, Air, Soil, Vinegar, Alcohol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.

What is a mixture ? Give two example of mixtures.