Multiple Choice Chemistry Quiz Template With Answers -Prof. Dan Schwartz
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6Chemistry 1211
Exam #3
Thursday, 4/17/2003
Prof. Dan Schwartz
7:00 – 8:30 P.M.
There is a single correct choice for each question. Answer all questions on the Scantron sheet by filling in
the proper bubble with a #2 pencil. If you change an answer, erase the undesired mark thoroughly.
Be sure to fill in the boxes for your student number and name; then correctly fill in the
corresponding bubbles beneath them.
A periodic table and other useful information are attached to the back of the exam.
There are 5 exam pages and 25 questions. Check to be sure you have answered them all!
1. (5 points) Stainless steel is an example of a
solution.
(a) gas/solid
(b) liquid/liquid
(c) solid/liquid
(d) solid/solid
2. (5 points) Commercial cold packs often contain solid NH
NO
and a pouch of water. The temperature
4
3
of the pack drops as the NH
NO
dissolves in water. Therefore, for the dissolving of NH
NO
in water
4
3
4
3
(a) DH
is negative and DS
may be negative or positive.
soln
soln
(b) DH
is negative and DS
is positive.
soln
soln
(c) DH
is positive and DS
may be negative or positive.
soln
soln
(d) DH
is positive and DS
is positive.
soln
soln
3. (5 points) Which should be least soluble in water?
(a) butane, H
C-CH
-CH
-CH
3
2
2
3
(b) formic acid, HCOOH
(c) methanol, H
C-OH
3
(d) methylamine, H
C-NH
3
2
4. (5 points) In general, as the temperature increases, the solubility of gases in water
and the
solubility of most solids in water
.
(a) decreases, decreases
(b) decreases, increases
(c) increases, decreases
(d) increases, increases
Exam #3
Page 1
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