WorksheetsTopic 1.1 Water
Total questions: 13
Worksheet time: 7mins
Which type of bond exemplifies a weak chemical bond?
Covalent bond
Hydrogen bond
Ionic bond
Nonpolar bond
Which statement is NOT true?
Water is polar.
Water can stabilize the temperature of nearby air.
Water is essential for life.
Water is the most abundant molecule in Earth’s atmosphere.
Why do hydrogen and oxygen form polar covalent bonds within water molecules?
Hydrogen is more electronegative than oxygen, generating a partial negative charge near the hydrogen atoms.
Hydrogen is more electronegative than oxygen, generating a partial positive charge near the hydrogen atoms.
Oxygen is more electronegative than hydrogen, generating a partial negative charge near the oxygen atom.
Oxygen is more electronegative than hydrogen, generating a partial positive charge near the oxygen atom.
What happens to the pH of a solution when acids are added?
The pH of the solution decreases
The pH of the solution increases
The pH of the solution increases and then decreases
The pH of the solution stays the same.
What is water’s property of adhesion?
The force that allows surface water molecules to escape and vaporize
The attraction between water molecules and other molecules
The intermolecular force between water molecules
The force that keeps particles dispersed in water
In a solution, what kind of molecule binds up excess hydrogen ions?
Acid
Base
Donor
Isotope
Which functional group is NOT polar?
Carbonyl
Hydroxyl
Methyl
Sulfhydryl
Why are hydrogen bonds and van der Waals interactions necessary for cells?
Hydrogen bonds and van der Waals interactions form weak associations between
molecules, providing the necessary shape and structure for DNA and proteins to
function in the body.
Hydrogen bonds and van der Waals interactions form strong associations between
molecules, providing the necessary shape and structure for DNA and proteins to
function in the body.
Hydrogen bonds and van der Waals interactions form weak associations between
different molecules, providing the necessary shape and structure for acids to function
in the body.
Hydrogen bonds and van der Waals interactions form strong associations between the
same molecules, providing the necessary shape and structure for acids to function in
the body.
Why can some insects walk on water?
Insects can walk on water because of its high surface tension.
Insects can walk on water because it is a polar solvent.
Insects can walk on water because they are less dense than water.
Insects can walk on water because they are denser than water.
Which statement describes how buffers help prevent drastic swings in pH?
Buffers absorb excess hydrogen and hydroxide ions to prevent increases or decreases
in pH. An example is the bicarbonate system in the human body.
Buffers absorb excess hydrogen ions to prevent increases or decreases in pH. An example is the bicarbonate system in the human body.
Buffers absorb excess hydroxide ions to prevent increases or decreases in pH. An example is the bicarbonate system in the human body.
Buffers absorb excess hydrogen and hydroxide ions to prevent increases or decreases
in pH. An example is carbonate system in the human body.
Which statement describes how buffers help prevent drastic swings in pH?
Buffers absorb excess hydrogen and hydroxide ions to prevent increases or decreases
in pH. An example is the bicarbonate system in the human body.
Buffers absorb excess hydrogen ions to prevent increases or decreases in pH. An
example is the bicarbonate system in the human body.
Buffers absorb excess hydroxide ions to prevent increases or decreases in pH. An
example is the bicarbonate system in the human body.
Buffers absorb excess hydrogen and hydroxide ions to prevent increases or decreases
in pH. An example is carbonate system in the human body.
What is the pH scale, and how does it relate to living systems? Give an example of how drastic pH changes are prevented in living systems.
The pH scale ranges from 0 to 14, where anything below 7 is acidic and above 7 is alkaline. The bicarbonate system in the human body buffers the blood.
The pH scale ranges from 0 to 14, where anything below 7 is alkaline and above 7 is
acidic. The bicarbonate system in the human body buffers the blood.
The pH scale ranges from 0 to 7, where anything below 7 is acidic and above 7 is
alkaline. Water in the human body buffers the blood.
pH scale ranges from 0 to 7, where anything below 4 is acidic and above 4 is alkaline.
Water in the human body buffers the blood.
What property of water makes it a good insulator within the bodies of endothermic (warm-blooded) animals?
Adhesion
Surface Tension
Heat of Vaporization
Specific heat capacity
