Question

The ``yellow boy'' formed due to acid mine drainage mainly consists of

• A. Ferric hydroxide
• B. Ferrous sulfate
• C. Ferrous hydroxide
• D. Ferric sulfate

Hint:

Acid mine drainage is a major environmental concern in mining, and understanding the chemistry behind ``yellow boy'' helps in developing effective mitigation strategies.

Answer 1

The Correct Option is C

The term "yellow boy" refers to the yellowish precipitate formed due to acid mine drainage, which occurs when sulfide minerals in mines react with water and oxygen to produce acidic water. This acidic water dissolves iron, and upon oxidation and hydrolysis, ferrous hydroxide (Fe(OH)$_2$) precipitates out, giving the characteristic yellow color. Ferric hydroxide (Fe(OH)$_3$) is more reddish-brown, while ferrous sulfate and ferric sulfate remain in solution and do not form the yellow precipitate.
Thus, the correct answer is Ferrous hydroxide.