Multiple choice

An impure substance melts at a temperature _______ than its standard melting point.

  1. same

  2. lower

  3. higher

  4. none of above

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Impurities disrupt the regular crystal lattice structure of a pure substance, making it easier to break intermolecular bonds. This melting point depression means impure substances always melt at temperatures lower than their pure form's standard melting point.