Multiple choice

The particles of a true solution cannot be seen with naked eyes because

  1. they settle at the bottom

  2. the number of particles is negligible

  3. the particles react with water to form a new compound

  4. the size of the particles is very small
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A true solution is a homogeneous mixture of two or more chemically non-reacting substances whose composition can be varied within certain limits. The particles of a true solution are less than 1 nm in diameter. So, they cannot be seen with naked eyes or even under a microscope. True solutions are stable, i.e. the particles do not settle down when kept undisturbed. Moreover, the particles in a true solution are non-reacting, i.e. they will not react to form any new compound and the amount of particles in a true solution is significant. 

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