MCQ practice · SSC Chemistry Board questions · Chapter 9: Acid-Base Balance
What colour does compound 'X' show?
Think it through first, then pick an option.
- a Blue
- b Red
- c Reddish brown
- d Green
Answer and explanation
Correct answer: c Reddish brown
X is Fe(OH)₃, a reddish-brown precipitate.
Why the other options are wrong
- a Blue: Not blue; the light-blue precipitate belongs to copper.
- b Red: Not plain red; ferric hydroxide is reddish brown.
- d Green: Green is ferrous Fe(OH)₂; this is a ferric salt.
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