Colloids have particle size range between
- A10^-7 m to 10^-10 m
- B10^7 m to 10^10 m
- C10^-10 m to 10^-12 m
- D10^-5 m to 10^-7 m
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (e) None of the above/More than one of the above
Explanation
Colloidal particles are between about 1 nm and 1000 nm across, that is 10⁻⁹ m to 10⁻⁶ m: bigger than the particles of a true solution and smaller than those of a suspension.
None of the four ranges given matches this, so the answer is "None of the above". Colloids such as milk, smoke and fog pass through filter paper and scatter light (the Tyndall effect).