Question

Among the following statement(s), what is true about colloids?
(A) They do not settle down when left undisturbed
(B) They are not visible to the naked eyes
(C) Their size generally ranges between \(10^{-5}\) and \(10^{-7}\) cm
(D) A colloidal solution is homogeneous in nature
Choose the correct answer from the options given below:

• A. (A) and (B) only.
• B. (A), (B) and (C) only.
• C. (B), (C) and (D).
• D. (A), (C) and (D) only.

Hint:

- True Solutions: Homogeneous, particle size < 1 nm (\(10^{-7}\) cm).
- Colloidal Solutions: Heterogeneous, particle size 1 nm to 1000 nm (\(10^{-7}\) to \(10^{-4}\) cm).
- Suspensions: Heterogeneous, particle size > 1000 nm (\(10^{-4}\) cm).

Answer 1

The Correct Option is B