Is Matter Around us Pure?(Practice Sheet, Class 9)

(1) What is concentration and give one formula to calculate it.

Solution-

(2) Write differences between mixture and compound.

Solution-

(3) Identify the phenomenon–

(i) Using sieve to separate tea and residue.

(ii) Getting colours from ink soluble in water.

(iii) Burning of camphor.

Solution-

(4) Identify pure substances and mixture

(i) Air

(ii) Silver

(iii) Sauce

(iv) Gold

(v) Jewelry of gold

(vi) Aluminium

Solution-

(5) What is solution and its parts.

Solution-

(6) Rita put some water on kerosene tub. Can she separate kerosene oil and water?

Solution-

(7) Name the elements which are found liquid at room temperature and which are found liquid at slightly above room temperature.

Solution-

(8) Find out physical and chemical changes among the given activities.

(i) A page from note book.

(ii) Cooked vegetable

(iii) Ashes of wood

(iv) Piece of apple

Solution-

(9)  Differentiate between element and compound.

Solution-

(10) A solution contains 60 g of common salt in 400 g of water. Calculate the concentration in terms of mass percentage of the solution.

Solution-

Helping Topics – 

Is Matter pure around us pure?

NCERT solutions, class  9

Differences betwen mixture and compound

Differences between element and compound

Picture1

Leave a comment