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Classifying matter
1. A solid melts gradually between 85°C and 95°C to give a milky, oily liquid. When a laser beam shines through the liquid, the path of the beam is clearly visible. The milky liquid is likely to be:
a heterogenous mixturea solutionan elementa compound
2. Smoke is an example of a(n):
gaseous solutionhomogeneous mixture compoundheterogeneous mixture element
3. A blue crystalline material is heated strongly in a test tube. A clear liquid condenses around the mouth of the tube and the crystals gradually lose their blue color and become white powder. Every gram of blue crystal produces 0.36 g of clear liquid and 0.64 g of colorless powder. The same weight relationships are observed for samples of the crystals taken from many different sources. These observations are consistent with the hypothesis that the blue crystals are:
a heterogeous mixturean elementa wet salta compounda solution
4. Antoine Lavoisier, the "father of chemistry", listed lime as a chemical element in his table of 33 known elements. Which of the following observations shows that lime cannot be an element?
Lime melts at a temperature of 2572°C.
Lime and carbon dioxide are produced when limestone is roasted.
When a certain soft metal is burned in oxygen, lime is produced (with no other products).
Lime reacts with water, generating a large amount of heat.
5. Vanillin contains 63.15% C, 5.30% H, and 31.55% O whether it is extracted from vanilla beans, synthesized chemically from clove oils, or extracted from wood pulp wastes. Vanillin is most likely to be:
a compound of C, H, and Oa solution of C in H and O
a homogenous mixture of elementsa heterogeous mixture of elements
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General Chemistry Online! Classifying matter

Copyright © 1997-2005 by Fred Senese
Comments & questions to fsenese@frostburg.edu
Last Revised 02/23/18.URL: http://antoine.frostburg.edu/chem/senese/101/matter/classify-matter-quiz.shtml