INORGANIC

1) It shud be KHF₂ (Potassium bi fluoride)

KHF2 ------(elctro.)---> K⁺ + HF₂^- ----> K⁺ + HF + F^-

Anode - 2F^- -------> F₂ + 2e-
Cathode - 2H+ + 2e- ------> H₂ (Hydrogen frm water 'coz Red. potential H+ > K+)

2) i) 2F₂ + 2NaOH ------> OF₂ + 2NaF + H₂O

ii) Shud form red coloured KO₃ sol.n ,not completely sure...

3) K₄[Fe(CN)₆] - Once elements get associated in coordination, they lose their ionisation property. Hence in an aqueous we will only find 4K+ & the complex sphere => the sol.n wud not give test fr Fe₂⁺ ion.

2) i) F₂ + NaOH ( cold and dilute ) → NaF + OF₂ + H₂O

F₂ + NaOH ( hot and conc. ) → NaF + O₂ + H₂O

ii) O₃ + KOH → KO₃( orange coloured solid ) + O₂ + H₂O

3) i didn't knew abt such a thing. i thought reaction of the two gives a white precipitate - K₂Fe[Fe(CN)₆]