Q. Colour of iodine solution is disappeared by shaking it with aqueous solution of
A) $Na_{2}S$
B) $Na_{2}S_{2}O_{3}$
C) $Na_{2}S$
D) $Na_{2}SO_{4}$
Explanation
(b)
$2Na_{2}S_{2}O_{3} + I_{2} \rightarrow 2NaI + Na_{2}S_{4}O_{6}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.