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InterviewSolution
| 1. |
`CaCO_3` exist inA. only one crystalline formB. only two crystalline formsC. three crystalline formsD. four crystalline forms |
| Answer» `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. | |