Question

crystals of Pure substance are obtaions by the process called-answer is crystallisation
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Answer 1

Answer:

In botany, a stoma, also called a stomate is a pore, found in the epidermis of leaves, stems, and other organs, that controls the rate of gas exchange. The pore is bordered by a pair of specialized parenchyma cells known as guard cells that are responsible for regulating the size of the stomatal opening.

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Answer 2

Explanation:

The process of deriving large crystals of pure substances from their solutions is known as crystallisation. Crystals of salt are obtained by the evaporation of sea water.