Question

Q)Give reasons
i. The formula for aluminium oxide is AI2O3, not AIO.
ii. A chemical equation needs to be balanced.
iii. Water is a compound, not mixture.
iv. Chlorine has similar kind of atoms.​

Answer 1

Answer:

1. Because Aluminium and Oxygen have no same valencies.

2. Because in chemical reaction atoms neither be created nor destroyed.

3. Because atoms of constituents of water are present in fixed ratio and water have formula H2O.

4. Chlorine molecules present in atmosphere have Cl2 form , having two same kind of atoms. And chlorine is an element.