Answer :
Final answer:
A melting point capillary tube is a thin glass tube used to determine the melting point of a solid substance. The preparation of the solid is important to ensure purity and obtain an accurate melting point.
Explanation:
A melting point capillary tube is a thin glass tube used to determine the melting point of a solid substance. It is usually sealed at one end and open at the other end. The solid substance is placed in the open end of the tube and heated until it melts.
The preparation of the solid is important because it ensures that the substance being tested is in a pure form. Impurities can affect the melting point, causing it to be lower or higher than expected. By preparing the solid properly, the accurate melting point of the substance can be determined.
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