31.Jose and Joice like to determine which liquid and solid is a pure substance During boiling the
temperature of liquid A changes at the start and becomes the same and constant while liquid B
boils at varying temperature. During melting, solid C melts completely and smoothly within a short
time while solid D has portions that seem not to be melting. Which samples are pure substances?
A. A and B
B. A and C
C. B and C
D. B and D
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Answer:
B. A and C
Explanation:
I think correct me if I'm wrong