11. During boiling, what happens to the temperature of a substance?
A. The temperature of a substance changes at the start then becomes constant.
B. The temperature of a substance is varying each time passed.
C. The substance melts completely within a short period of time.
D. The substance has portions that seem to be not melting.
12. There are mixtures that are homogeneous which may be mistaken as substances. Being so, appearance may not be the best basis to differentiate substances from mixtures. Which way can be BEST utilized to distinguish substances from mixtures?
A. Observing the boiling point and melting point behavior of the materials.
B. Observing the behavior of the material as it is exposed in varying temperatures.
C. Conduct further investigations about separating the components of the mixture if it is substance or not.
D. Separating the components of the mixture by physical means and investigate for the observable properties.
13. When a solution contains less solute than the maximum amount it can dissolve at a given temperature it is said to be?
A. Heterogeneous
B. Homogeneous
C. Saturated
D. Unsaturated
14. If the solution contains the maximum amount of solute dissolved by a given amount of solvent it is called
A. Heterogeneous
B. Homogeneous
C. Saturated
D. Unsaturated
15. What is the evidence that a solution is saturated?
A. If there is a large amount of dissolved solute at a certain volume of solvent.
B. If it has a small amount of dissolved solute in comparison to the amount of solvent.
C. If it contains the maximum amount of solute dissolved by a given amount of solvent.
D. If it contains less solute than the maximum amount it can dissolve at a given temperature.
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11. A
12. D
13. D
14. C
15. C
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