Question

Size of colloidal particle varies from:

• A. ${10}^{-7}\mathrm{to}{10}^{-9}\mathrm{cm}$
• B. ${10}^{-9}\mathrm{to}{10}^{-17}\mathrm{cm}$
• C. ${10}^{-5}\mathrm{to}{10}^{-7}\mathrm{cm}$
• D. ${10}^{-4}\mathrm{to}{10}^{-10}\mathrm{cm}$

Answer 1

The correct option is C

${10}^{-5}\mathrm{to}{10}^{-7}\mathrm{cm}$

Explanation:

Colloid:

• A colloidal solution is a heterogeneous system in which a definite substance is distributed in the form of very small particles as a dispersed phase in another substance called a dispersed medium.
• And in case of separation, these particles will pass through the filter paper but not through the semi-permeable membrane.
• The size of the colloid particles will range between $1\mathrm{to}1000\mathrm{nanometres}$ which means from ${10}^{-5}\mathrm{to}{10}^{-7}\mathrm{cm}$ and is dispersed throughout the second substance.

Therefore, the correct answer is (C)