Question

The incorrect statement among the following is :-

(1) VOSO₄ is a reducing agent

(2) Cr₂O₃ is an amphoteric oxide

(3) RuO₄ is an oxidizing agent

(4) Red colour of ruby is due to the presence of CO³⁺

Answer 1

(4) Red colour of ruby is due to the presence of CO³⁺

(i) In VOSO₄, 'V' is in +4 oxidation state. So it act as oxidising agent.

(ii) Cr₂O₃ is an amphoteric oxide.

(iii) In RuO₄, 'Ru' is in +8 oxidation state. So it act as oxidising agent.

(iv) Red colour of ruby is due to the presence of
Cr⁺³ ions in Al₂O₃.