Topical Questions
These questions are keyed to the major topics in the chapter. Usually a question that is answered at the back of this book is paired with a similar one that is not.
In each case, identify the underlined property as a physical or a chemical property. Give a reason for your choice.
(a) Dry Ice sublimes (changes directly from a solid to a gas) at -78.6 °C.
(b) Methanol (methyl alcohol) burns in air with a colorless flame.
(c) Sugar is soluble in water.
(d) Hydrogen peroxide, H2O2, decomposes to form oxygen, O2, and water, H2O.
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