CHEM 1100
Practice Test 1

Note: These questions are representative of the types of questions you can expect on the test. The actual test will be longer, typically between 20-40 questions. You will need to bring a SCANTRON answer sheet to each test.


1. Which of the following is a physical change?

a. lard when heated changes into a liquid
b. bleach turns hair yellow
c. sugar when heated turns brown
d. milk turns sour
e. battery cables corrode


2. Which of the following is a chemical change?

a. lard when heated changes into a liquid
b. water evaporating
c. mixing sugar and water
d. milk turns sour
e. cutting a piece of copper wire


4. Many home freezers maintain a temperature of 0 ^oF. Express this in ^oC.

a. - 32 ^oC
b. - 18 ^oC
c. 0 ^oC
d. 18 ^oC
e. 57.6 ^oC


5. Iron has a density of 7.86 g/cm³. The volume of 55.85 g of iron is:

a. 0.141 cm³
b. 7.11 cm³
c. 2.8 cm³
d. 439 cm³
e. 4.38 x 10²⁴ cm³


6. An aluminum ion, Al³⁺, has:

a. 13 protons and 13 electrons
b. 27 protons and 27 electrons
c. 16 protons and 13 electrons
d. 13 protons and 10 electrons
e. 10 protons and 13 electrons


7. Which pair of elements would most likely form an ionic compound?

a. P and Br
b. Zn and K
c. F and Al
d. C and S
e. H and Br


8. What is the formula for the simple ionic compound formed by calcium and selenium?

a. CaSe
b. Ca₂Se
c. CaSe₂
d. Ca₃Se
e. CaSe₃


9. The correct name for Ba(OH)₂ is:

a. barium hydrogen oxide
b. boron hydroxide
c. barium dihydroxide
d. beryllium hydroxide
e. barium hydroxide


10. Identify the compound that is INCORRECT.

a. Ca₃(PO₄)₂ for calcium phosphate
b. NaNO₃ for sodium nitrate
c. K₂CO₃ for potassium carbonate
d. NH₄SO₄ for ammonium sulfate
e. KCl for potassium chloride


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