University of Toronto CHMA10: Old Exam Practice Questions and Answers

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University of Toronto




Old Exam Practice Questions and
Answers



Course: CHMA10 Introductory Chemistry I

, Multiple Choice Questions (1 Mark Each, Total Marks = 50)
Your multiple choice answers MUST be transferred to the scantron DURING the time allotted for the test.
ONLY THE ANSWERS ON THE SCANTRON SHEET WILL BE SCORED


1) Use the periodic table to predict the most stable oxidation state for the following element: Al
A) +1 B) +2 C) +3 D) -1 E) -2

2) Using periodic trends, place the following bonds in order of increasing ionic character.

S-F Se-F O-F

A) Se-F < S-F < O-F
B) O-F < S-F < Se-F
C) O-F < Se-F < S-F
D) Se-F < O-F < S-F
E) S-F < Se-F < O-F

3) Give the approximate bond angle for a molecule with tetrahedral electron geometry and trigonal
pyramidal molecular geometry.

A) 180° B) <109.5° C) <180° D) <120° E) 109.5°

4) How much energy is required to heat 36.0 g H2O from a liquid at 65 °C to a gas at 115 °C? The following
physical data may be useful:

ΔvapH = 40.7 kJ mol-1
Cliq = 4.18 J g-1 °C-1
Cgas = 2.01 J g-1 °C-1
Csol = 2.09 J g-1 °C-1
Tmelting = 0 ∘C
Tboiling = 100 ∘C

A) 52.7 kJ B) 10.9 kJ C) 63.5 kJ D) 91.7 kJ E) 87.7 kJ

5) Choose the ground-state electron configuration for Ti2⁺.
A) [Ar]3d4
B) [Ar]4s23d4
C) [Ar]4s2
D) [Ar]3d2
E) [Ar]4s23d2




6) Place the following in order of decreasing IE1.