Biochem Module 2 Set Exam Questions
& Answers (Grade A+)
What is the shape of water? -
correct answer ✅Bent. The bond angle is 104.5 degrees.
What is autoionization, and how is it important for water? -
correct answer ✅Autoionization is the ability of a compound to
react with itself to form ions. One water molecule reacts with a
second molecule to form two ions: H3O+ and OH-. These ions exist
in small amounts in pure water and influence the chemistry of
water.
Name the three non-covalent forces discussed in this module -
correct answer ✅1. Dipole-dipole forces, 2. Hydrogen bonding,
and 3. London dispersion forces
What type of non-covalent interaction is known as the strongest
dipole-dipole force? -
correct answer ✅.hydrogen bonds.
Would the following be a hydrogen donor or acceptor? Or both? -
correct answer ✅.Only a hydrogen acceptor due to the electrons
on the oxygen. It is not a hydrogen donor because the electrons are
bonded to a carbon.
, Biochem Module 2 Set Exam Questions
& Answers (Grade A+)
How does the strength of London forces change with increasing
molecular weight? Explain briefly. -
correct answer ✅As molecular weight increase, the strength of
London forces also increase. This is due to the increased number of
electrons in larger molecules. The larger number of electrons
creates the potential of stronger temporary dipoles.
Calculate the pH of solution containing 0.12 M of OH-. -
correct answer ✅pH = 13.08
If a solution contains 0.00023M of H+, then what is the OH-
concentration? -
correct answer ✅4.35 X 10-11 M OH-
If a solution contains 1.67 x 10-8 M OH-, then what is H+
concentration? -
correct answer ✅5.99 x 10-7 M H+ or 6 X 10-7M
A solution contains H+ at a concentration of 1.67 x 10-6 M. Is the
solution acidic, basic, or neutral? Explain briefly. -
correct answer ✅Acidic. The pH = 5.77, which is acidic. Students
should use the pH scale Table in Module 2 to determine this.
& Answers (Grade A+)
What is the shape of water? -
correct answer ✅Bent. The bond angle is 104.5 degrees.
What is autoionization, and how is it important for water? -
correct answer ✅Autoionization is the ability of a compound to
react with itself to form ions. One water molecule reacts with a
second molecule to form two ions: H3O+ and OH-. These ions exist
in small amounts in pure water and influence the chemistry of
water.
Name the three non-covalent forces discussed in this module -
correct answer ✅1. Dipole-dipole forces, 2. Hydrogen bonding,
and 3. London dispersion forces
What type of non-covalent interaction is known as the strongest
dipole-dipole force? -
correct answer ✅.hydrogen bonds.
Would the following be a hydrogen donor or acceptor? Or both? -
correct answer ✅.Only a hydrogen acceptor due to the electrons
on the oxygen. It is not a hydrogen donor because the electrons are
bonded to a carbon.
, Biochem Module 2 Set Exam Questions
& Answers (Grade A+)
How does the strength of London forces change with increasing
molecular weight? Explain briefly. -
correct answer ✅As molecular weight increase, the strength of
London forces also increase. This is due to the increased number of
electrons in larger molecules. The larger number of electrons
creates the potential of stronger temporary dipoles.
Calculate the pH of solution containing 0.12 M of OH-. -
correct answer ✅pH = 13.08
If a solution contains 0.00023M of H+, then what is the OH-
concentration? -
correct answer ✅4.35 X 10-11 M OH-
If a solution contains 1.67 x 10-8 M OH-, then what is H+
concentration? -
correct answer ✅5.99 x 10-7 M H+ or 6 X 10-7M
A solution contains H+ at a concentration of 1.67 x 10-6 M. Is the
solution acidic, basic, or neutral? Explain briefly. -
correct answer ✅Acidic. The pH = 5.77, which is acidic. Students
should use the pH scale Table in Module 2 to determine this.
