10. What is/are true for substance and mixture?
I. Pure substance melts completely.
II. Pure substance has a varying boiling point.
III. Mixture does not melt completely.
IV. Mixture has a fixed boiling point.
A. I and II only
B. I and III only
C. II and IV only
D. I and IV only
I. Pure substance melts completely.
II. Pure substance has a varying boiling point.
III. Mixture does not melt completely.
IV. Mixture has a fixed boiling point.
A. I and II only
B. I and III only
C. II and IV only
D. I and IV only
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Answer:
D.
Explanation:
sure
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