Question

Amorphous solids are those which have:

• A. fixed arrangement of atoms and molecules
• B. no fixed melting point
• C. regular geometry
• D. no of the above

Answer 1

Answer: (B)

no fixed melting point

Properties of Amorphous solids:

(a) Amorphous solids do not have any regular arrangement of the constituent particles. They may have short range order. The amorphous solids have irregular shapes.

(b) They do not have sharp melting point. They gradually soften over a range of temperatures. They do not have definite enthalpy of fusion.

(c) When cut with a sharp edged tool they cut into two pieces with irregular surfaces.

(d) Amorphous solids are isotropic in nature. It is because the arrangement of constituent particles is irregular along all the directions. Therefore, the value of any physical property (electrical resistance or refractive index) would be same along each direction.

So, option B is correct.