Question

Fill in the blank by choosing the correct words from the options given below:

In a solid, the particles occupy a ________ positions.

• A. Brownian
• B. Higher
• C. Stronger
• D. Melting
• E. Liquid
• F. Fixed

Answer 1

The correct option is F

Fixed

The explanation for the correct option:

(F) Fixed

• Solids have tight molecular arrangements where the inter-molecular movement is least.
• This is due to strong inter-molecular forces of attraction hence, the position of molecules remains fixed.

The explanation for incorrect options:

(A) Brownian

• In fluids, a particle changes its path when another particle collides with it. Further collisions cause the particle to follow a random, zig-zag motion which is known as Brownian movement.
• Brownian movement causes the particles in a fluid to be in constant motion.
• It involves a transfer or exchange of energy between the particles.

(D) Melting

• The process by which a substance’s solid-state changes into the liquid state at a constant temperature by absorption of heat is known as fusion or melting.
• The very temperature at which the melting occurs at normal atmospheric pressure is known as the melting point, wherein a matter exists both in a solid and liquid state.

Therefore, in a solid, the particles occupy fixed positions.