CHEMISTRY
JAMB 2024 - Question 21
Chemistry 2024 JAMB Past Questions - Question 21: Common salt (NaCl) is used to pre serve foods. Which of the following properties can be used to determine its purity before use?
A:
B:
C:
D:
Correct Answer
B
Explanation
Generally, the purity of a solid substance can be determined using its melting point. A pure solid melts at a sharp temperature or over a narrow temperature. Impurities tend to lower the melting point and broaden the melting range. By comparing the observed melting point of a sample with the known melting point of the pure substance, we can assess the purity of the sample. If they match closely, the sample is likely pure; if there is a significant deviation, it suggests the presence of impurities.
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