Question

Question 2 : Which of the following is not a property of suspension ?

•Suspension is a heterogeneous mixture .

•The particles of a suspension cannot be seen by naked eye .

• The particles of a suspension scatter a beam of light passing through it and make its path visible .

• All these are the properties of suspensions​

Answer 1

The correct option is- The particles of a suspension cannot be seen by naked eye.

• Suspension is a heterogeneous mixture of two or more components in which particles are not equally distributed throughout the mixture.
• The particles are large in size and hence, we can see them through the naked eye.
• The path of light becomes visible when light is passed through a suspension as particles of suspension scatter a beam of light. Hence, suspension shows the Tyndall effect.

Answer 2

The property which is not of suspension is particles of a suspension cannot be seen by naked eye.

Explanation:

• Suspension is a heterogeneous mixture.
• In such mixtures, particles settle down at the bottom of the container which hold the mixture.
• Particles of suspension is too large to be visible even with naked eyes. Size of particles is greater than 1000 nanometres.
• After leaving the mixture for a few minutes, gravity pulls the particles down and it gets suspended at the bottom. Gravitational pull is enough for physically separating components in suspensions.
• Due to large size of particles, beam of light is either scattered or the suspension acts as opaque.