Biochemistry Module 2 Exam Questions & Answers (Grade A+).docx

Biochemistry Module 2 Exam Questions
& Answers (Grade A+)
The pH of a solution of 3.2 x 10-10 M NaOH is:
A. 3.7
B. 3.7 x 10-10
C. 4.5
D. 13
E. 8.7 -
correct answer ✅C. 4.5


Which attribute contributes to water's unusual properties?
A. The geometry of the molecule
B. The polarity of the O-H bonds
C. The ability of water molecules to hydrogen bond
D. The bond angle of water
E. All of the answers are correct -
correct answer ✅E. All of the answers are correct


What factor contributes to the bent shape of a water molecule? -
correct answer ✅The unshared electron pairs on the oxygen atom

, Biochemistry Module 2 Exam Questions
& Answers (Grade A+)
Which diagrams correctly represent a hydrogen bond? -
correct answer ✅A and D


The H+ concentration of a solution is 5.6 x 10-5 What is the pH? -
correct answer ✅4.25


If the Ka of an acid is 7.45 x 10-10, what is the pKa? -
correct answer ✅9.13


List the acids in INCREASING order of strength (weakest to
strongest):
Nitrous acid (Ka = 4.0 x 10-4); acetic acid (Ka = 1.7 x 10-5);
phosphoric acid (Ka = 7.3 x 10-3) -
correct answer ✅Acetic acid, nitrous acid, phosphoric acid


Elemental bromine (Br2) is a liquid at room temperature. What is
the dominant attractive force that exists between Br2 molecules in
the liquid? -
correct answer ✅London Forces


Which one of the following molecules can form a hydrogen bond?
A. HI