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JEE Advanced 2015Paper 2
Exam
JEE Advanced
Year
2015
Paper
Paper 2
Subject
Chemistry
Chapter
Practical Chemistry

JEE Advanced 2015 · Paper 2 · Chemistry · Practical Chemistry

The pair(s) of ions where BOTH the ions are precipitated upon...

The pair(s) of ions where BOTH the ions are precipitated upon passing H2S{H}_{2}S gas in presence of dilute HCl, is (are)

Options

  1. ABa2+,Zn2+B{a}^{2 +}, Z{n}^{2 +}
  2. BBi3+,Fe3+B{i}^{3 +}, F{e}^{3 +}
  3. CCu2+,Pb2+C{u}^{2 +}, P{b}^{2 +}
  4. DHg2+,Bi3+H{g}^{2 +}, B{i}^{3 +}

Correct answer

C. Cu2+,Pb2+C{u}^{2 +}, P{b}^{2 +}

Step-by-step solution

Precipitate is formed on passing H2S{H}_{2}S in acidic medium i.e., ion must be of group II.
Cu2+,Pb2+,Hg2+,Bi3+C{u}^{2 +}, P{b}^{2 +}, H{g}^{2 +}, B{i}^{3 +}
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