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JAMB Chemistry 2015 Paper

Question : 61

Total: 64

The oxidation state of sulphur on H2SO4 acid is

Solution:

Concept:

The oxidation state of an element in a compound is calculated from the known oxidation states of the other atoms.

Explanation:

\mathrm{H}_2\mathrm{SO}_4

, hydrogen has an oxidation state of

+1

and oxygen has

-2

Let the oxidation state of sulphur be

x

The total charge of the compound is zero, so:

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

2 + x - 8 = 0

x - 6 = 0

Therefore,

x = +6

Answer:

The oxidation state of sulphur in

\mathrm{H}_2\mathrm{SO}_4

+6

Correct option: B.

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