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In the wet tests for identification of various cations by precipitation, which transition element cation doesn't belong to group IV in qualitative inorganic analysis?

Options

  1. AFe 3 +
  2. BZn 2 +
  3. CCo 2 +
  4. DNi 2 +

Correct answer

A. Fe 3 +

Step-by-step solution

Cations are segregated in 5 groups depending upon their solubility with the help of various precipitating reagents. As per the segregation, Zn 2 + ,   Co 2 + ,   Ni 2 + belongs to the 4th group and Fe 3 + belongs to the 3rd group.

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