Q.

Which of the following is wrong regarding amorphous substances

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a

Amorphous solids possess uniform chemical composition

b

The amorphous solids are isotropic in nature

c

Amorphous solids do not have sharp melting points

d

The change of state for amorphous solids does not occur at a fixed temperature

answer is A.

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Detailed Solution

They do not have uniform chemical composition, because bonds  between atoms and molecules are not of equal strength. Also, there is no long range order in them and arrangement is irregular along all directions. Therefore, value of any physical property would be same along any direction.
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