Multiple choice

The addition of NH4CNS to a neutral solution of cobalt(II) salt produces

  1. red precipitates

  2. yellow precipitates

  3. blue precipitates

  4. green precipitates

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Add 5 ml of dil. HCl to salt and boil it. Add 1 ml of amyl alcohol ether and 1 ml of NH4CNS solution. Shake well and the upper layer is coloured intense blue.