Practice Test 1

Note: These questions are representative of the types you can expect on the test. The actual test will be longer, typically between 20-40 questions.
You will need to bring a SCANTRON and pencil to each class test.
Instructions: Select the best answer then click on "get answer" box.

Question 1. Which of the following is a physical change only?
a. Lard when heated changes into a liquid
b. Iron rusting
c. Sugar when heated turns brown
d. Milk turns sour
e. Battery cables corrode

Question 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

Question 3. 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

Question 4. 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

Question 5. 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

Question 6. Which pair of elements would most likely form an ionic compound?
a. P and Br
b. F and Al
c. Zn and K
d. C and S
e. H and Br

Question 7. What is the formula for the simple ionic compound formed by calcium and selenium?
a. CaSe3
b. Ca2Se
c. CaSe2
d. Ca3Se
e. CaSe

Question 8. The correct name for Ba(OH)2 is
a. barium hydrogen oxide
b. boron hydroxide
c. barium dihydroxide
d. beryllium hydroxide
e. barium hydroxide

Question 9. Identify the compound that has the incorrect formula
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

Question 10. The Crookes tube was used to discover
a. Protons
b. Electrons
c. Neutrons
d. The nucleus
e. Alpha particles