Question

a single substance that exists in two or more forms is called
a) polymorphous
b) amorphous
c) isomorphous
d)mono-morphous

Answer 1

polymorphous ........well the accurate answer depends on the substance
if it is a element (like carbon) then called allotroph
or if it is a compound (e.g ZnS) it is polymorphous
:)

Answer 2

A single substance that exists in two or more forms is called polymorphous substance.

Polymorphous substance:

• Substances which exhibit polymorphism is referred to as polymorphous substance.
• A substance's capacity to crystallize into various crystalline forms is known as polymorphism.
• These crystal changes are also referred to as polymorphs.
• Polymorphs behave differently in the solid state even though they are the same in the liquid or gaseous states.
• Examples of polymorphic substances are graphite, fullerene, diamond, etc.

Amorphous substance:

• Any non-crystalline solid whose atoms and molecules are not arranged in a clear lattice pattern is said to be amorphous.
• Examples of polymorphous substances are glass, plastic, gel, etc

Isomorphous substance:

• The similarity of crystal structure between two or more different substances is known as isomorphism of minerals.
• Examples of isomorphous substances are sodium nitrate, calcium sulphate, etc.

Mono-morphous substance:

• Mono-morphous substances are those substances which exists in only one crystalline form
• Examples of mono-morphous substances are copper, dysprosium, etc.

Therefore, the correct answer is (a) polymorphous

Read more:

1. https://brainly.in/question/6328505

2. https://brainly.in/question/48880997

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