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WorksheetsWater
Total questions: 25
Worksheet time: 29mins
Name
Class
Date
1.
Capillary action is the result of adhesion. Which aspect of water is responsible for this?
a)
Nonpolar covalent bonds enable water to dissolve other substances.
b)
Polar covalent bonds join molecules of water to other substances.
c)
Hydrogen bonds form between water and another substance.
d)
Ionic bonds enable electrons to flow through water and into another substance.
2.
Some insects can stand on the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?
a)
The insects are light enough so they do not break the hydrogen bonds holding the water molecules together
b)
The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.
c)
The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.
d)
The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next
3.
What two elements make up water?
a)
Helium and oxygen
b)
Hydrogen and oxygen
c)
Helium and carbon
d)
Oxygen and carbon
4.
What term describes when water is attracted to other substances?
a)
Cohesion
b)
Adhesion
c)
Capillary Action
d)
Surface Tension
5.
Why does water move from the roots to the leaves of plants?
a)
Water is pushed by solutes.
b)
Capillary action pulls the water molecules like a chain.
c)
Water is pulled by gravity.
d)
Water’s cohesion causes it to “pull” towards the leaves.
6.
Attractions between water molecules due to polarity are called:
a)
Covalent bonds
b)
Ionic bonds
c)
Polar bonds
d)
Hydrogen bonds
7.
The attraction that causes water and other liquids to form drops on thin films is called ________________. This is also water’s ability to be attraction to other water molecules.
a)
adhesion
b)
capillary action
c)
cohesion
d)
surface tension
8.
What property of water helps to moderate earth's temperature?
a)
adhesion
b)
cohesion
c)
specific heat capacity
d)
pH
9.
Why does ice float?
a)
As water freezes, it expands and its density decreases.
b)
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.
c)
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
d)
As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.
10.
Water is polar because...
a)
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
b)
The molecule has two poles, at which the it is colder than other regions of the molecule.
c)
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
d)
The water molecule is neutral.
11.
Water is a universal solvent because it...
a)
It can be found anywhere
b)
It freezes when it gets cold
c)
floats when frozen
d)
Dissolves most substances
12.
What is a solution that has the maximum amount of solute dissolved at a specific temperature and pressure?
a)
Supersaturated
b)
Saturated
c)
Unsaturated
d)
Undefined
13.
In a sample of salt water, NaCl would be considered the ______.
a)
Solution
b)
Solute
c)
Solvent
d)
Solvation
14.
In a sample of salt water, water would be considered the ______.
a)
Solute
b)
Solvent
c)
Solution
d)
Solvation
15.
______ means “will dissolve in”.
a)
miscible
b)
immiscible
c)
soluble
d)
insoluble
16.
Amount of solute in a given amount of solvent or solution
a)
Concentration
b)
Miscible
c)
Solute
d)
solubility
17.
Forms hydroxide ions in water
a)
Acids
b)
Bases
c)
All
18.
Forms hydronium ions in water.
a)
Acids
b)
Bases
c)
All
19.
pH less than 7.
a)
Acids
b)
Bases
c)
All
20.
pH greater than 7.
a)
Acids
b)
Bases
c)
All
21.
H3PO4
a)
acid
b)
base
c)
none
22.
The pH scale is based off of the concentration of _________ ions.
a)
Oxygen
b)
Hydrogen
c)
Hydroxide
d)
None of the others
23.
NaOH
a)
acid
b)
base
c)
neutral
24.
In a neutralization reaction, what are the products of a reaction between an acid and a base?
a)
Another acid and base
b)
Carbon dioxide and a salt
c)
Water and a salt
d)
Either two acids or two bases
25.
According to the pH range which substance is more acidic than lemon juice
a)
Hydrochloric acid
b)
cabbage
c)
milk
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