Question

The diameter of the colloidal particles may range from________.

• A. ${10}^3\mathrm{m}\mathrm{to}{10}^{-3}\mathrm{m}$
• B. ${10}^{-3}\mathrm{m}\mathrm{to}{10}^{-6}\mathrm{m}$
• C. ${10}^{-6}\mathrm{m}\mathrm{to}{10}^{-9}\mathrm{m}$
• D. ${10}^{-9}\mathrm{m}\mathrm{to}{10}^{-12}\mathrm{m}$

Answer 1

The correct option is C

${10}^{-6}\mathrm{m}\mathrm{to}{10}^{-9}\mathrm{m}$

The explanation for the correct answer

Option (C) ${10}^{-6}\mathrm{m}\mathrm{to}{10}^{-9}\mathrm{m}$

• The colloidal particles are microscopic, solid particles that are suspended in fluids.
• Its diameter ranges from ${10}^{-6}\mathrm{m}\mathrm{to}{10}^{-9}\mathrm{m}$.
• If we consider nanometers, the size is about 1 nanometer in diameter.

The explanation for the incorrect answers

Option (A) ${10}^3\mathrm{m}\mathrm{to}{10}^{-3}\mathrm{m}$

• The range is quite larger and doesn't stand for colloids.
• Thus option is incorrect.

Option (B)${10}^{-3}\mathrm{m}\mathrm{to}{10}^{-6}\mathrm{m}$

• The range of colloids is smaller than ${10}^{-3}\mathrm{m}\mathrm{to}{10}^{-6}\mathrm{m}$.
• Thus this option is incorrect.

Option (D) ${10}^{-9}\mathrm{m}\mathrm{to}{10}^{-12}\mathrm{m}$

• Colloids are slightly bigger than the range given.
• Thus option is incorrect.

Hence, the diameter of the colloidal particles ranges from ${10}^{-6}\mathrm{m}\mathrm{to}{10}^{-9}\mathrm{m}$.

Hence, option (C) is the correct answer.