Q. In the formation of $SO_{3}$ by $SO_{2}$ and $O_{2}$ using $NO$ as catalyst, the catalytic action of $NO\$is evidenced by :
A) Green vapours
B) Violet vapours
C) Brown vapours
D) None of these
Explanation
(c)
NO reacts with $O_{2}$ to give intermediate, $NO_{2}$ (brown vapours).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.