Answer
d.
Work Step by Step
Only elements and compounds are considered pure substances.
a. Mineral water is not pure because it is a mixture of substances.
b. Blood is not pure because it is a mixture.
c. Brass is an alloy, so it is not a pure substance.
d. Sucrose is a compound, so it is a pure substance.
e. Beer is not an element or a compound, so it is not a pure substance.
