The following reaction is used for the preparation of oxygen gas in the laboratory
`2KClO_(3)(s)underset("Catalyst")overset("Heat")to2KCl(s)+3O_(2)(g)`
Which of the following statement(s) is/are correct about the reaction?

Options

A. Potassium is undergoing oxidation
B. Chlorine is undergoing oxidation
C. Oxygen is reduced
D. None of the species are undergoing oxidation or reduction

Answer

a,b,c,d

Explanation

Write the oxidation number of each element above its symbol, then,
`2overset(+1)(K)overset(+5)(Cl)overset(-2)(O_(3))to2overset(+1)(K)overset(-1)(Cl)+3overset(0)(O_(2))`
(a) The O.N. of K does not change, K undergoes neither recution nor oxidation. Thus, option (a) is not correct
(b) The O.N. of chlorin decreases from +5 in `KClO_(3)` to -1 in KCl, hence Cl undergoes reduction.
( c) Since, O.N. of oxygen increases from -2 in `KClO_(3)` to 0 in `O_(2)`, oxygen is oxidised
This statement is not correct because Cl is undergoing reduction and O is undergoing oxidation.