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18. A solid is said to be amnorphous when:

(A) it bas detinite geometrical shape
(B)it has no geometrical shape
(C)it has definite colour
(D)it has no definite colour

User Cyphorious
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Final answer:

An amorphous solid lacks a definite geometric shape and has a disordered atomic structure. Glass is an example of an amorphous solid.


Step-by-step explanation:

An amorphous solid is one that lacks a definite geometric shape. It does not have a regular repeating pattern in its atomic structure like a crystalline solid. Instead, its particles are arranged randomly, resulting in a more disordered structure.

One common example of an amorphous solid is glass. Unlike a crystal, which has a specific lattice arrangement, glass lacks order in its atomic structure, giving it a more isotropic or non-directional property.

So, the correct option is (B) it has no geometrical shape.


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User Delfina
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