Question

The size of colloidal particles is between:

• A. ${10}^{-5}$ to ${10}^{-7}m$
• B. ${10}^{-4}$ to ${10}^{-10}m$
• C. ${10}^{-9}$ to ${10}^{-17}m$
• D. ${10}^{-6}$ to ${10}^{-9}m$

Answer 1

The correct option is D ${10}^{-6}$ to ${10}^{-9}m$

Depending on the size of solute particles, mixtures are divided into solutions, colloids and suspensions. When the solute is smaller in the range of a 1000 nm to 1 nm, it is said to be in the colloidal range.