Question

When comparing melting temperature ranges of pure and impure samples, which of the following statements describes the melting temperature range of an impure sample?

For a pure substance: the melting temperature range is narrower than that of an impure sample or the melting temperature range is broader than that of an impure sample?

For an impure substance: the melting point is higher than that of a pure samplr or the melting point is lower than that of a pure sample