State whether the following statement is true or false:

The presence of impurities in a substance lowers its melting point.

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True

False

answer is A.

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Detailed Solution

The given statement is true.
Concept: In this case, the effect of contaminants on the melting point should be considered. The presence of impurities in a substance lowers its melting point.Knowledge of impurities and melting points
The presence of a solid state causes depression at the melting point to form. Many solids, including ice, form as molecular lattices or crystalline ions. The interactions between the molecules in this lattice keep it together and result in a strong, stable structure.A specific temperature must be reached in order for this structure to be destroyed and the solid to melt. TAs a result, in the presence of contaminants, the lattice weakens and becomes less stable. t a lower temperature, the chemical then melts.
Impurities in the ice can help it melt faster. For example, adding salt to frozen streets can help. As a result, the ice's melting point drops, making it easier to melt.
Hence, the given statement is true.

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