What are the products formed when moist chlorine gas is reacted with hypo?

What are the products formed when moist chlorine gas is reacted with hypo?
  1. $\mathrm{Na}_2 \mathrm{SO}_4, \mathrm{~S}, \mathrm{HCl}$
  2. $\mathrm{Na}_2 \mathrm{SO}_3, \mathrm{~S}, \mathrm{HCl}$
  3. $\mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6, \mathrm{Na}_2 \mathrm{SO}_3, \mathrm{HCl}$
  4. $\mathrm{Na}_2 \mathrm{~S}_4 \mathrm{O}_6, \mathrm{NaCl}, \mathrm{HCl}$

Solution

When moist chlorine gas is reacted with hypo then colloidal sulphur, $\mathrm{HCl}$ and sodium sulphate products are formed. $\mathrm{Na}_2 \mathrm{~S}_2 \mathrm{O}_3+\mathrm{H}_2 \mathrm{O}+\mathrm{Cl}_2 \rightarrow \mathrm{Na}_2 \mathrm{SO}_4+2 \mathrm{HCl}+\mathrm{S}$

Asked in: AP EAMCET 2011

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