question_answer 1)

    In the following questions two or more options may be correct. Which of the following statement(s) is/are not true about the following decomposition reaction? \[2KCI{{O}_{3}}\to 2KCl+3{{O}_{2}}\] (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, d)\[2\overset{+1+5-2}{\mathop{KCl{{O}_{3}}}}\,\to 2\overset{+1-1}{\mathop{KCl}}\,+3\overset{0}{\mathop{{{O}_{2}}}}\,\] Potassium is neither oxidised nor reduced. It is a redox reaction in which chlorine is reduced while oxygen is oxidised.