Question

Passing $H _{2} S$ gas through nitric acid produces

• A. rhombic sulphur
• B. colloidal sulphur
• C. amorphous sulphur
• D. plastic sulphur

Answer 1

Answer: (B)

colloidal sulphur

Answer 2

Nitric acid, being a strong oxidising agent, oxidises hydrogen sulphide into colloidal sulphur. $3 H _{2} S +2 HNO _{3} \longrightarrow \underset{\text { yellow ppt}}{3S}+2 NO +4 H _{2} O$