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Olympiad workbook
Exam
Olympiad workbook
Subject
NSEC
Chapter
s Block Elements

Olympiad workbook · NSEC · s Block Elements

A sample of water from a river was analyzed for the presence of...

A sample of water from a river was analyzed for the presence of metal ions and the observations were recorded as given below
Reagent added Observation
dil. HCl No change
aq. Na2CO3Na_2 CO_3 White precipitate
aq. Na2SO4Na_2 SO_4 No change
The water sample is likely to contain

Options

  1. ABa2+\mathrm{Ba}^{2+}
  2. BCu2+\mathrm{Cu}^{2+}
  3. CLi+\mathrm{Li}^{+}
  4. DMg2+\mathrm{Mg}^{2+}

Correct answer

D. Mg2+\mathrm{Mg}^{2+}

Step-by-step solution

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