(c)
H_{2}S acts as a reducing agent, because it can reduce PbO into PbS.
PbO+H_{2}S⟶PbS+H_{2}O
(b)it is acidic in nature . In chalcogens, the acidic nature of hydride increases from H_{2}O to H_{2}Te.
(c) it is not an oxidizing agent.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.