The oxidation state of chlorine in potassium chlorate is?

  • A +1
  • B +2
  • C +3
  • D +5
  • E +7
jamb 1978chemistry

The correct answer is D. +5

- potassium chlorate --> KClO\(_3\)

valencies of K = +1, O = -2.

: (+1) + Cl + ( -2  X 3 atoms ) = 0

Cl + 1 - 6 = 0

Cl = 5

∴ The oxidation state of chlorine in potassium chlorate is +5

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