Question

Q4. Answer the following questions in few words (10) marks
1. Name the categories of matter on the basis of their chemical composition.
2. Name the elements present in ca(OH)2
3. Name the element represented by the symbols - Fe, Cu, Zn and Au
4. Name the compound having chemical formula Al2(SO4)3
5. Chemical formula of water.​

Answer 1

Explanation:

1) On the basis of composition, matter can be classified as compound, element and mixture. Solids, liquids and gases are physical states of matter

2) The elements which are present in Ca ( OH ) 2 is calcium, oxygen and hydrogen

3) iron, copper , zinc , gold

4) Aluminium sulfate

5) H2O

Answer 2

1. On the basis of composition, matter can be classified as compound, element and mixture. Solids, liquids and gases are physical states of matter.

2. The elements which are present in Ca ( OH ) 2 is calcium, oxygen and hydrogen.

3 . iron, copper, zinc, gold

4. Aluminium sulfate

5. H2O

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