Which of the following is NOT a property of an amorphous solid?

They have a sharp melting point.

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They do not have definite heat of fusion.

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They are known as super cooled liquids.

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They are isotropic in nature.

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Solution

The correct option is A
They have a sharp melting point.

Amorphous (Greek amorphos = no form) consists of particles of irregular shape. The arrangement of constituent particles (atoms, molecules or ions) in such solids only has short range order. So, they do not have a sharp melting point.

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Similar questions

which of the following statement is not true about amorphous solids ?

(a) On heating they may become crystalline at certain temperature

(b) They may become crystalline on keeping for long time

(d) They are anisotropic in nature

Assertion(A): Real expansion of liquid does not depend up on material of container.

Reason (R): Liquids have no definite shape. They acquire the mouth of the containers in which they are taken.

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