Q. Sodium thiosulphate is prepared by
A) Boiling ${Na}_{2}{SO}_{3}$ solution with S in alkaline medium
B) Reducing ${Na}_{2}{SO}_{4}$ solution with $H_{2}S$
C) Boiling ${Na}_{2}{SO}_{3}$ solution with S in acidic medium
D) Neutralising $H_{2}S_{2}O_{3}$ solution with $NaOH$
Explanation
(a)
${Na}_{2}{SO}_{3} + S\ \overset{\ NaOH\ \ }{\rightarrow}\ \ \ \ \ \ \ \ \ \ \ {Na}_{2}S_{2}O_{3}\ \$
$sodium\ thiosulphate$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.