Question

Assertion : Fe(OH)₃ and As₂S₃ colloidal sols on mixing precipitate.

Reason: Fe(OH). and As₂S₃ combine and form precipitate of new composition.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (c) A is true but R is false

Explanation:

On mixing Fe(OH)₃ (+ve sol) and As₂S₃ (-ve sol), mutual coagulation occurs which causes precipitation. No new compound is formed.