Sample Questions - Chapter 1

Foundations of Chemistry

Examples of
Multiple Choice Questions

1.: Of the following name/symbol combinations of elements, which one is WRONG?; (a) uranium/U; (b) sulfur/S; (c) nitrogen/N; (d) potassium/K; (e) iron/I
2.: Of the following symbol/name combinations of elements, which one is WRONG?; (a) C/carbon; (b) B/barium; (c) F/fluorine; (d) N/nitrogen; (e) U/uranium
3.: The chemical symbol for manganese is; (a) Mn; (b) Mo; (c) Ma; (d) Ga; (e) Mg
4.: The number 0.005436 has how many significant figures?; (a) 7; (b) 3; (c) 4; (d) 5; (e) 6
5.: The number 10.00 has how many significant figures?; (a) 1; (b) 2; (c) 3; (d) 4; (e) 5
6.: What is the volume of a 2.50 gram block of metal whose density is 6.72 grams per cubic centimeter?; (a) 16.8 cubic centimeters; (b) 2.69 cubic centimeters; (c) 0.0595 cubic centimeters; (d) 0.372 cubic centimeters; (e) 1.60 cubic centimeters
7.: A cube of 1.2 inches on the side has a mass of 36 grams. What is the density in g/cm³?; (a) 21; (b) 2.2; (c) 30.; (d) 1.3; (e) 14
8.: Nitric acid is a very important industrial chemical: 1.612 x 10¹⁰ pounds of it were produced in 1992. If the density of nitric acid is 12.53 pounds/gallon, what volume would be occupied by this quantity? (1 gallon = 3.7854 liters); (a) 7.646 x 10¹¹ liters; (b) 8.388 x 10⁹ liters; (c) 1.287 x 10⁹ liters; (d) 5.336 x 10¹⁰ liters; (e) 4.870 x 10⁹ liters
9.: Identify the INCORRECT statement.; (a) Helium in a balloon: an element; (b) Paint: a mixture; (c) Tap water: a compound; (d) Mercury in a barometer; an element
10.: An unused flashbulb contains magnesium and oxygen. After use, the contents are changed to magnesium oxide but the total mass does not change. This observation can best be explained by the; (a) Law of Constant Composition.; (b) Law of Multiple Proportions.; (c) Avogadro's Law.; (d) Law of Conservation of Mass.
11.: Which answer includes all the following that are chemical changes and not physical changes?; I. freezing of water; II. rusting of iron; III. dropping a piece of iron into hydrochloric acid (H₂ is produced); IV. burning a piece of wood; V. emission of light by a kerosene oil lamp; (a) III and IV; (b) II and V; (c) I, II, III, IV, and V; (d) II, III, and V; (e) II, III, IV, and V
12.: Which response lists all of the following properties of sulfur that are physical properties and not other properties?; I. It reacts with hydrogen when heated.; II. It is a yellow solid at room temperature.; III. It is soluble in carbon disulfide.; IV. Its density is 2.97 g/cubic centimeter; V. It melts at 112°C.; (a) II, III, IV, and V; (b) II, IV, and V; (c) I; (d) II, III, and IV; (e) III, IV, and V

Answers:

1. (e) 2. (b) 3. (a) 4. (c) 5. (d) 6. (d) 7. (d) 8. (e) 9. (c) 10. (d) 11. (e) 12. (a)

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