You are given two liquid mixtures 'X' and 'Y'. Both appear to be homogeneous. but 'X' does not scatter light whereas 'Y' scatters light. Which of the following is true about these two mixtures?

You are given two liquid mixtures 'X' and 'Y'. Both appear to be homogeneous. but 'X' does not scatter light whereas 'Y' scatters light. Which of the following is true about these two mixtures? Correct Answer 'X' is a true solution; 'Y' is a colloid

The correct answer is 'X' is a true solution; 'Y' is a colloid.

Concept:

Mixtures:

  • A mixture is a substance that consists of two or more elements or compounds not chemically combined together.
  • For Example - Air is a mixture of gases like oxygen, nitrogen, argon, CO2, and water vapor. 

Types of Mixtures:

  • Homogeneous Mixture:
    • Those mixtures, in which the substances are completely mixed together and are indistinguishable from one another, are called homogeneous mixtures.
    • For example Soda water, Soft drinks, lemonade, salt or sugar solution, etc.
  • Heterogeneous Mixture:
    • Those mixtures in which the substances remain separate and one substance is spread throughout the other substance as small particles, droplets, or bubbles are called heterogeneous mixtures.
    • All the suspensions and colloids are heterogeneous mixtures.
    • For Example: - Sugar and sand mixture, muddy river water, soap solution. 

Explanation:

Mixtures can be classified into solutions, colloids, and suspensions on the basis of the size of the particles they are made of.

True Solution Colloid Suspension
 It is a form of homogeneous mixture  It appears to be homogeneous but actually, it is heterogeneous  It is a form of a   heterogeneous mixture
 
 Particle size is less   than 1 nm  Particle size range from 1 and 1000 nm  Particle size greater than   1000 nm
 Particles do not settle   when left undisturbed  Particles do not settle down  Particles settle down well
 Cannot be separated by filtration  Cannot be separated by   filtration  Can be separated by   filtration
It does not scatter light  It Shows the Tyndall effect (scatters light)  May scatter light
 Particles are not visible to the naked eye  Particles are not visible through the naked eye  Particles are easily visible through the naked eye

X is homogeneous and doesn't scatter light. So, it is a true solution.

Y appears to be homogenous but scatters light. So, it is a colloid. 

Bissoy MCQ

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