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A few drops of concentrated HNO\(_3\) is added to an unknown solution and boiled for...

Chemistry
JAMB 2011

A few drops of concentrated HNO\(_3\) is added to an unknown solution and boiled for a while. If this produces a brown solution, the cation present is likely to be

  • A. Pb2+
  • B. Cu2+
  • C. Fe3+
  • D. Fe2+
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Correct Answer: Option C
Explanation

The brown color indicates the presence of iron (III) (Fe\(^{3+}\)).

There is an explanation video available below.

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Explanation Video

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts