Question

how to find oxidation number for an element, if it have more oxidation numbers

Answer 1

Oxidation Number of some elements should be known to you.

For Example :-

★ All the Nobel gases have Oxidation state = 0

★ Oxygen, Sulphur have Oxidation state = -2

★ S - Block 1st Group elements have Oxidation state = +1

★ S- Block 2nd group elements have Oxidation state = +2

★ Hydrogen have Oxidation Number = +1

★ Oxidation state of peroxide is -1



# Examples :-

1) H2SO4 =>

Let's consider the oxidation state of Sulphur 'S' be x

So, (+1)(2) + x (-2)(4) = 0 (since overall charge is neutral)

x = +6

2) KMnO4

Let's consider the oxidation state of Mangnese 'Mn' be x

(+1) + x + (-2)(4) = 0
x = +7

:D

Answer 2

Answer:

Please see the photos