Colourless salt (A) gives white ppt (B) with NaOH; ppt (B) dissolves in excess of NaOH to form (C). On passing H2S gas into (A) solution white ppt (D) appears. (A) also gives white ppt (E) with AgNO3 solution.
Which of following is compound C?
Answer & explanation
Correct answer: option 3
Ppt (B) dissolves in excess of NaOH to form (C).
Zn(OH)2 + 2NaOH⟶Na2ZnO2 + H2O