CBSE 9 is matter around us pure-001

IS MATTER AROUND US PURE

A.     Define the following

1.      What is a mixture

2.      What is a solution

3.      Compound

4.      Physical changes

5.      Suspension

B.     Answer in short

1.      How do you express concentration of a solution?

2.      What are colloids? State their characteristics?

3.      Describe the process of filtration

4.      Types of pure substances

5.      What are metalloids? Give example

C.     DIFF B/W

1.      Elements and compounds

2.      Physical and chemical changes

3.      True solution and colloidal solution

4.      Mixture and solution

5.      Solute and solvent