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:

            (A) compound

            (B) element

            (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

             element is:

            (A) Helium

            (B) Carbon

            (C) Hydrogen

            (D) Oxygen

            (E) Nitrogen

 

_____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.

            (A)   6

            (B) 179

            (C) 180

            (D) 181

            (E) None of these

 

____6. Which of the following is an example of a chemical property?

            (A) density

            (B) ductility

            (C) electrical conductivity

            (D) flammability

            (E) hardness

 

____7.  Which of the following is evidence for a physical change?

            (A) boiling

            (B) freezing

            (C) sublimation

            (D) crystallization

            (E) all of the above

 

____8.  Which of the following is not a form of energy but a state of energy?

            (A) light

            (B) electrical

            (C) nuclear

            (D) chemical

            (E) kinetic

 

____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

 

 

 

 

 

 

 

 

Answers:

1. a    2. c    3. d    4. c    5. d   6. d   7. e   8. e   9. e    10. d