CHM 2045C Module One Sample Exam
M-1 Part M: Multiple Choice-Chapter 1 & 2 10 points
In the blanks below select the choice that best fits the description:
____1. Which of the following describes a substance in the solid physical state?
(A) The substance has definite shape and definite volume.
(B) The substance has no definite shape and no definite volume.
(C) The substance has definite shape but no definite volume.
(D) The substance has no definite shape but definite volume.
(E) None of the above.
____2. According to the kinetic theory, temperature measures which of the following?
(A) molecular attraction
(B) molecular mass
(C) molecular motion
(D) Molecular size
(E) None of the above
____3. Bronze is an alloy of copper and tin and the percentage of copper can vary
from 70-90%. Classify bronze as one of the following:
(C) heterogeneous mixture
(D) homogeneous mixture
(E) pure substance
_____4. From periodic chart to periodic chart, one element is an exception or in a class
by itself. It is placed in different positions on the chart depending on the text
author. It is not a metal, probably has most characteristics of a nonmetal, could
be called a semi-metal by some, and is gaseous at room temperatures. That
_____5. Vitamin B-12 is a water soluble vitamin. If the formula is C63H88CoN14O14P,
what is the number of atoms in a molecule of vitamin B-12.
(E) None of these
____6. Which of the following is an example of a chemical property?
(C) electrical conductivity
____7. Which of the following is evidence for a physical change?
(E) all of the above
____8. Which of the following is not a form of energy but a state of energy?
____9. According to the conservation of mass and energy law, which of the following is
true of matter and energy?
(A) energy may be destroyed but not matter
(B) matter may be destroyed but not energy
(C) matter is neither created nor destroyed
(D) energy is neither created nor destroyed
(E) matter and energy are interconvertible
____10. What is the term for a property that can be observed without changing the
chemical formula of a substance?
(A) atomic property
(B) chemical property
(C) molecular property
(D) physical property
(E) nuclear property
1. a 2. c 3. d 4. c 5. d 6. d 7. e 8. e 9. e 10. d