1.

oxidation no of sulphur in caro's acid is

Answer»

Oxidation number of sulphur in  Caro's - Peroxymonosulfuric acid (H2SO)

2 + x - 10

x= +8

x= oxidation number of Sulphur

But this cannot be true as maximum oxidation number for S cannot exceed + 6. Since S has only 6 electrons in its valence shell.

This exceptional value of
oxidattion state for sulphur in H2SO is due to the peroxy linkage shown by two atoms.

so,
Oxidation number of S in H2SO5

2 (+1) + x + 3 (-2) + 2 (-1) [for peroxy linkage] = 0

2 + x -6 -2 = 0

x = + 6

so,
Oxidation number of S in H2SO5 is +6.



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