JEE Advanced 2008Paper 1
- Exam
- JEE Advanced
- Year
- 2008
- Paper
- Paper 1
- Subject
- Chemistry
- Chapter
- p Block Elements (Group 15, 16, 17 & 18)
JEE Advanced 2008 · Paper 1 · Chemistry · p Block Elements (Group 15, 16, 17 & 18)
Aqueous solution of Na _ 2 ~S _ 2 O _ 3 on reaction with Cl _ 2...
\text{ Aqueous solution of } \mathrm{Na}}_{2} \mathrm{~S}}_{2} \mathrm{O}}_{3} \text{ on reaction with } \mathrm{Cl}}_{2}
Options
- A
- B
- C
- D
Correct answer
B.
Step-by-step solution
Sodium thiosulphate, gets oxidised by chlorine water.
\mathrm{Na}}_{2} \mathrm{ S}}_{2} \mathrm{O}}_{3}+4 \mathrm{Cl}}_{2}+5 \mathrm{H}}_{2} \mathrm{O} \longrightarrow2 \mathrm{NaHSO}}_{4}+8 gets oxidised by into
2 \mathrm{Na}}_{2} \mathrm{ S}}_{2} \mathrm{O}}_{3}+2 \mathrm{FeCl}}_{3} \longrightarrow \mathrm{Na}}_{2} \mathrm{ S}}_{4} \mathrm{O}}_{6}+2 \mathrm{FeCl}}_{2}+2 Further, decomposes on treatment with dilute acids
\mathrm{Na}}_{2} \mathrm{ S}}_{2} \mathrm{O}}_{3}+2 \mathrm{HCl} \longrightarrow2 \mathrm{NaCl}+\mathrm{SO}}_{2}+\mathrm{S}+\mathrm{H}}_{2} \mathrm{O}