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CaCO3 exist in...

`CaCO_3` exist in

A

only one crystalline form

B

only two crystalline forms

C

three crystalline forms

D

four crystalline forms

Text Solution

Verified by Experts

`CaCO_3` is dimorphous i.e., it exits in two crystalline forms, calcite and aragonite. Calcite is the stable form at room temperature. It is found in marble , chalk, egg shells and sea shells. Argonite is a meta stable form at room temperature. It exists in shells and coral and separates from hot lime water when `CO_2` is passed though it.
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