Understanding Colloidal Solutions

What is a colloidal solution?

• A solid dissolved in a liquid

• A mixture where substances are regularly suspended in a fluid

• A solution where particles settle at the bottom

• A homogeneous mixture of two liquids

Why do colloidal solutions appear homogeneous?

• Because they are transparent

• Because they are made of a single substance

• Because the particles are uniformly spread and small

• Because the particles are large and visible

What is the Tyndall effect?

• The refraction of light through a prism

• The reflection of light by a surface

• The absorption of light by colloidal particles

• The scattering of light by colloidal particles

How can the Tyndall effect be observed in everyday life?

• By observing light passing through a glass of water

• By seeing a beam of light enter a room through a small hole

• By looking at a rainbow

• By watching a sunset

Which of the following is a property of colloids?

• They settle down when left undisturbed

• They do not scatter light

• They are homogeneous mixtures

• Their particles are too small to be seen individually