JEE Main
- Exam
- JEE Main
- Subject
- Chemistry
- Chapter
- Redox Reactions
JEE Main · Chemistry · Redox Reactions
If the molecular wt. of \ (Na _ 2 ~S _ 2 O _ 3 ) and \ ( I _ 2 )...
If the molecular wt. of \(\mathrm{Na}}_{2}\mathrm{~S}}_{2} \mathrm{O}}_{3}) and \$(\mathrm{I}}_{2}) are \$(\mathrm{M}}_{1}) and \$(\mathrm{M}}_{2}) respectively, then what will be the equivalent wt. of \$(\mathrm{Na}}_{2}\mathrm{~S}}_{2} \mathrm{O}}_{3}) and \$(\mathrm{I}}_{2}) in the following reaction?
(2\mathrm{~S}}_{2} mathrm{O}_3^{2-}+}_{2} \longrightarrow \mathrm{S}}_{4}\mathrm{O}}_{6}^{2-}+2 ^{-})$
Options
- A(\mathrm{M}}_{1}, \mathrm{M}}_{2})
- B(\mathrm{M}}_{1}, \mathrm{M}}_{2} / 2)
- C(2 \mathrm{M}}_{1}, \mathrm{M}}_{2})
- D(\mathrm{M}}_{1}, 2 \mathrm{M}}_{2})
Correct answer
B. (\mathrm{M}}_{1}, \mathrm{M}}_{2} / 2)
Step-by-step solution
Hints: 
(\begin{aligned} & \text { n.f. }\left(\mathrm{S}}_{2} \mathrm{O}}_{3}^{2-}\right)=1, \text { Equivalent mass }=\frac{\mathrm{M}_1}{1}=\mathrm{M}}_{1} \\ & \mathrm{n} \mathrm{f} .\left(\mathrm{I}}_{2}\right)=2, \quad \text { Equivalent mass }=\frac{\mathrm{M}_2}{2} \end{aligned}$)
(\begin{aligned} & \text { n.f. }\left(\mathrm{S}}_{2} \mathrm{O}}_{3}^{2-}\right)=1, \text { Equivalent mass }=\frac{\mathrm{M}_1}{1}=\mathrm{M}}_{1} \\ & \mathrm{n} \mathrm{f} .\left(\mathrm{I}}_{2}\right)=2, \quad \text { Equivalent mass }=\frac{\mathrm{M}_2}{2} \end{aligned}$)