Question

Which amongst the following substances have constituent particles that are big enough to be visible to our naked eyes?

• A. Butter
• B. Honey
• C. Salt water
• D. Mud water

Answer 1

The correct option is D Mud water

The table below gives the size of particles present in various mixtures. $$\begin{array}{cc}\text{Mixture}& \text{Size of particles}\\ \text{Solution}& \text{Less than}{10}^{-9}\text{m}\\ \text{Colloid}& \text{Between}{10}^{-9}\text{-}{10}^{-6}\text{m}\\ \text{Suspension}& \text{Greater than}{10}^{-6}\text{m}\end{array}$$ Except for suspensions, neither true solutions nor colloids have constituent particles that are big enough to be visible to our naked eyes.

Amongst the given options, only mud water is a suspension. Butter and honey are colloids while salt water is a solution.