pBlock ElementsII 2 Question 13
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13. Aqueous solution of $\mathrm{Na}{2} \mathrm{~S}{2} \mathrm{O}{3}$ on reaction with $\mathrm{Cl}{2}$ gives
======= ####13. Aqueous solution of $\mathrm{Na}{2} \mathrm{~S}{2} \mathrm{O}{3}$ on reaction with $\mathrm{Cl}{2}$ gives
3e0f7ab6f6a50373c3f2dbda6ca2533482a77bed (a) $\mathrm{Na}{2} \mathrm{~S}{4} \mathrm{O}_{6}$
(b) $\mathrm{NaHSO}_{4}$
(c) $\mathrm{NaCl}$
(d) $\mathrm{NaOH}$
(2008, 3M)
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Solution:
- Sodium thiosulphate, $\mathrm{Na}{2} \mathrm{~S}{2} \mathrm{O}{3}$ gets oxidised by chlorine water as $\mathrm{Na}{2} \mathrm{~S}{2} \mathrm{O}{3}+4 \mathrm{Cl}{2}+5 \mathrm{H}{2} \mathrm{O} \longrightarrow 2 \mathrm{NaHSO}{4}+8 \mathrm{HCl}$ $\mathrm{FeCl}{3}$ oxidises $\mathrm{Na}{2} \mathrm{~S}{2} \mathrm{O}{3}$ to $\mathrm{Na}{2} \mathrm{~S}{4} \mathrm{O}{6}$.
