Question

7 multiple choice 1 point after recrystallization, the purified sample shows a sharp melting point compared to the crude sample. this indicates: presence of more impurities higher degree of purity lower crystallinity incomplete drying previous next

Explanation:

In chemistry (a subfield of Natural Science), impurities in a sample typically broaden the melting point range. A sharp melting point after recrystallization (a purification technique) indicates that the sample has fewer impurities, meaning a higher degree of purity. The other options are incorrect: more impurities would broaden the melting point, lower crystallinity is not related to sharpness from recrystallization, and incomplete drying affects moisture content, not the sharpness of the melting point.

Answer:

B. Higher degree of purity