Which of these is not a colloid:

Detailed Solution:

The correct answer is “Honey”.

The answer is (4) Honey. Milk, blood, and ice cream are all colloids.

A colloid is a suspension where microscopic particles of one substance (dispersed phase) are distributed throughout another substance (dispersing medium). In these cases:

1) Milk: Fat globules are dispersed in water.
2) Blood: Blood cells, proteins, and other substances are dispersed in plasma.
3) Ice cream: Air bubbles and fat droplets are dispersed in a frozen sugar solution. Honey, on the other hand, is a true solution.