Biology Test 2 Part 2
Going over Biologys' 2nd test part 2
- 1.In which of these are the electrons always shared unequally?
- A.
Double covalent bond
- B.
Polar covalent bond
- C.
Triple covalent bond
- D.
Ionic and covalent bonds
- E.
Hydrogen bond
- 2.An example of a hydrogen bond would be the
- A.
Bond between a carbon atom and a hydrogen atom.
- B.
Bond between two carbon atoms.
- C.
Bond between sodium and chlorine.
- D.
Bond between two water molecules.
- 3.Water flows freely, but does not separate into individual molecules because water is
- A.
Cohesive.
- B.
Hydrophobic.
- C.
Hydrophilic.
- D.
Adhesive.
- 4.Water can absorb a large amount of heat without much change in temperature, and therefore it has
- A.
A high heat capacity.
- B.
A high surface tension.
- C.
Ten times as many hydrogen ions.
- D.
Ten times as many hydroxide ions.
- 5.Which of these properties of water cannot be attributed to hydrogen bonding between water molecules?
- A.
Water stabilizes temperature inside and outside the cell.
- B.
Water molecules are cohesive.
- C.
Water is a solvent for many molecules.
- D.
Ice floats on liquid water.
- E.
Water stablizes temperature inside and outside the cell. as well as Water is a solvent for many molecules
- 6.
![This Graph illustrates - ProProfs]( "This Graph illustrates")
This Graph illustrates- A.
That ice is less dense than water.
- B.
That ice is more dense than water.
- C.
Why ice floats on water.
- D.
That ice is less dense than water.As well as Why Ice is more dense than water. are correct
- E.
Why water molecules form hydrogen bonds with other water molecules.
- F.
All of these are correct.
- 7.Acids
- A.
Release hydrogen ions in solution.
- B.
Cause the pH of a solution to rise above 7.
- C.
Take up sodium ions and become neutral.
- D.
Increase the number of water molecules.
- E.
Release Hydrogen ions in solution and cause the Ph of a solution to rise above 7
- 8.Which of these best describes the changes that occur when a solution goes from pH 5 to pH 8?
- A.
The hydrogen ion concentration decreases as the solution goes from acidic to basic
- B.
The hydrogen ion concentration increases as the solution goes from basic to acidic.
- C.
C. The hydrogen ion concentration decreases as the solution goes from basic to acidic.
- 9.When water dissociates, it releases
- A.
Equal amounts of H+ and OH–.
- B.
b. more H+ than OH–.
- C.
C. more OH– than H+.
- D.
D. only H+.
- 10.Rainwater has a pH of about 5.6; therefore, rainwater is
- A.
A neutral solution.
- B.
An acidic solution.
- C.
A basic solution.
- D.
It depends on whether the rainwater is buffered.
- 11.If a chemical accepted H+ from the surrounding solution, the chemical could be
- A.
A base.
- B.
None of these are correct.
- C.
An acid.
- D.
A buffer.
- E.
A base and an acid
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