Question

$As_2S_2$ sol is

• A. positive colloid
• B. negative colloid
• C. neutral colloid
• D. none of the above

Answer 1

Answer: (B)

negative colloid

Answer 2

Metallic sulphides like $As _{2} S _{3}, Sb _{2} S _{3}$ and CdS sols are examples of negatively charged colloids.