Hydrogen & s-Block · JEE Main previous year questions

2018 1 question

1. Q882018 · 8 Apr 2018 · Shift 1

   Hydrogen peroxide oxidises $[\text{Fe}(\text{CN}{)}_6{]}^{4-}$ to $[\text{Fe}(\text{CN}{)}_6{]}^{3-}$ in acidic medium but reduces $[\text{Fe}(\text{CN}{)}_6{]}^{3-}$ to $[\text{Fe}(\text{CN}{)}_6{]}^{4-}$ in alkaline medium. The other products formed are, respectively :

   1. A.${\text{H}}_2\text{O}$ and $({\text{H}}_2\text{O}+{\text{OH}}^{-})$
   2. B.$({\text{H}}_2\text{O}+{\text{O}}_2)$ and ${\text{H}}_2\text{O}$
   3. C.$({\text{H}}_2\text{O}+{\text{O}}_2)$ and $({\text{H}}_2\text{O}+{\text{OH}}^{-})$
   4. D.${\text{H}}_2\text{O}$ and $({\text{H}}_2\text{O}+{\text{O}}_2)$
   Show answer

   Answer: D