Question:

Which of the following is NOT true about the amorphous solids ?

Updated On: Apr 27, 2024
  • Amorphous solids can be moulded by heating.
  • On heating they may become crystalline on certain temperature.
  • They are anisotropic in nature
  • They may become crystalline on keeping for long time.
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The Correct Option is C

Solution and Explanation

The statement that is NOT true about amorphous solids is: (C) They are anisotropic in nature. 
Amorphous solids do not have a well-defined long-range order like crystalline solids. They have a disordered arrangement of atoms or molecules, resulting in a lack of symmetry in their structure. Due to this lack of long-range order, amorphous solids exhibit isotropic properties, meaning their properties are the same in all directions. In contrast, crystalline solids have a well-defined periodic arrangement and can exhibit anisotropic properties, meaning their properties can vary depending on the direction. 
Therefore, amorphous solids are NOT anisotropic in nature.

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Concepts Used:

Solid State

Solids are substances that are featured by a definite shape, volume, and high density. In the solid-state, the composed particles are arranged in several manners. Solid-state, in simple terms, means "no moving parts." Thus solid-state electronic devices are the ones inclusive of solid components that don’t change their position. Solid is a state of matter where the composed particles are arranged close to each other. The composed particles can be either atoms, molecules, or ions. 

Solid State

Types of Solids:

Based on the nature of the order that is present in the arrangement of their constituent particles solids can be divided into two types;

  • Amorphous solids behave the same as super cool liquids due to the arrangement of constituent particles in short-range order. They are isotropic and have a broad melting point (range is about greater than 5°C).
  • Crystalline solids have a fixed shape and the constituent particles are arranged in a long-range order.