Multiple choice

Which of the following sulphides, when dissolved in conc. HNO3, will show positive test with ammonium molybdate?

  1. ZnS

  2. CuS

  3. As2S3

  4. SnS

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

Correct option is (3). As2S3 dissolves in nitric acid to form H3AsO4, which gives a yellow crystalline ppt. with ammonium molybdate.