Question

Select the correct statements about $N{a}_2{S}_2{O}_3.5H_{2}O$.

• A. It is also called as hypo
• B. It is used in photography to from complex with AgBr
• C. It can be used as antichlor
• D. it is used to remove stains of $I_2$

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A It is also called as hypo
B It is used in photography to from complex with AgBr
C It can be used as antichlor
D it is used to remove stains of $I_2$

Correct statements about ${Na}_2{S}_2{O}_3$. ${5H}_{2}O$

• it is also called as hypo.
  
• it is used in photography to form a complex with AgBr.
  

${2S}_2{O}_3^{2-}+AgBr⟶{\left[{Ag\left(S_2{O}_3\right)}_2\right]}^{3-}+{Br}^{-}$

• it can be used as antichlor

$4NaClO+{Na}_2{S}_2{O}_3+2NaOH⟶4NaCl+{2Na}_2{SO}_4+H_{2}O$

• it is used to remove stains of $I_2$.
  

${2S}_2{O}_3^{2-}+I_2⟶S_4{O}_6^{2-}+{2I}^{-}$