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Chemistry of Water : Chemistry
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Practice Test
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Question 1 of 37
What is the chemical formula of water?
Choose 1 answer
H2O
H2O2
HO
OH
Question 2 of 37
Which type of bond holds the hydrogen and oxygen atoms together in a water molecule?
Choose 1 answer
Ionic bond
Covalent bond
Hydrogen bond
Van der Waals bond
Question 3 of 37
What is the shape of a water molecule?
Choose 1 answer
Linear
Trigonal planar
Tetrahedral
Bent
Question 4 of 37
What is the pH level of pure water at 25°C?
Choose 1 answer
0
7
14
5
Question 5 of 37
Water has a high boiling point compared to other similar-sized molecules due to what property?
Choose 1 answer
Van der Waals forces
Ionic bonds
Hydrogen bonding
Covalent bonds
Question 6 of 37
What is the term for the energy required to change water from liquid to gas?
Choose 1 answer
Heat capacity
Latent heat of vaporization
Specific heat
Latent heat of fusion
Question 7 of 37
How many hydrogen bonds can each water molecule form?
Choose 1 answer
1
2
3
4
Question 8 of 37
What is the density of water at 4°C?
Choose 1 answer
0.998 g/cm³
1.000 g/cm³
1.002 g/cm³
0.995 g/cm³
Question 9 of 37
What is the process of water turning into ice called?
Choose 1 answer
Vaporization
Condensation
Freezing
Melting
Question 10 of 37
Which of the following is a property of water due to its hydrogen bonding?
Choose 1 answer
High surface tension
High reactivity
Low boiling point
Low specific heat capacity
Question 11 of 37
What is the term for water's ability to dissolve many substances?
Choose 1 answer
Solvent power
Hydrophobic interaction
Solubility
Ionization
Question 12 of 37
What is the name of the process where water molecules escape into the air as vapor?
Choose 1 answer
Evaporation
Condensation
Sublimation
Freezing
Question 13 of 37
What happens to water density as it freezes?
Choose 1 answer
Increases
Decreases
Stays the same
Becomes unpredictable
Question 14 of 37
In which state of matter does water have the highest density?
Choose 1 answer
Solid
Liquid
Gas
Plasma
Question 15 of 37
What term describes the amount of heat needed to raise the temperature of water by one degree Celsius?
Choose 1 answer
Specific heat capacity
Latent heat
Heat of vaporization
Thermal conductivity
Question 16 of 37
What effect does water's high specific heat have on climate?
Choose 1 answer
Regulates temperature
Causes extreme temperatures
Increases evaporation
Decreases rainfall
Question 17 of 37
What is the process of water transitioning directly from a solid to a gas called?
Choose 1 answer
Sublimation
Deposition
Melting
Freezing
Question 18 of 37
How does the addition of salt to water affect its boiling point?
Choose 1 answer
Raises it
Lowers it
Has no effect
Causes it to boil instantly
Question 19 of 37
What is the main component of the water in the Earth's atmosphere?
Choose 1 answer
Liquid water
Ice
Water vapor
Salt water
Question 20 of 37
What is the term for water's ability to cling to other substances?
Choose 1 answer
Cohesion
Adhesion
Surface tension
Viscosity
Question 21 of 37
What is the term for the heat required to change water from liquid to solid?
Choose 1 answer
Latent heat of fusion
Latent heat of vaporization
Specific heat
Heat capacity
Question 22 of 37
What is the role of water in biological systems?
Choose 1 answer
Solvent
Reactant
Temperature regulator
All of the above
Question 23 of 37
What phenomenon explains the rise of water in capillary tubes?
Choose 1 answer
Capillary action
Surface tension
Hydrogen bonding
Evaporation
Question 24 of 37
What is the effect of adding an acid to water?
Choose 1 answer
Raises pH
Lowers pH
No effect on pH
Neutralizes pH
Question 25 of 37
What is the name of the process where water is split into hydrogen and oxygen using electricity?
Choose 1 answer
Electrolysis
Hydrolysis
Oxidation
Reduction
Question 26 of 37
What is the maximum density of water?
Choose 1 answer
0°C
4°C
10°C
25°C
Question 27 of 37
Which property of water allows it to act as a universal solvent?
Choose 1 answer
Polarity
Hydrogen bonding
Covalent bonding
Surface tension
Question 28 of 37
What is the term for the attraction between water molecules?
Choose 1 answer
Hydrogen bonding
Cohesion
Adhesion
Van der Waals forces
Question 29 of 37
Which property of water is responsible for its high heat capacity?
Choose 1 answer
Hydrogen bonding
Covalent bonding
Ionic bonding
Van der Waals forces
Question 30 of 37
What happens to the vapor pressure of water as temperature increases?
Choose 1 answer
Increases
Decreases
Stays the same
Becomes unpredictable
Question 31 of 37
What is the process of water changing from a gas to a liquid called?
Choose 1 answer
Condensation
Evaporation
Sublimation
Freezing
Question 32 of 37
What is the boiling point of water at standard atmospheric pressure?
Choose 1 answer
50°C
75°C
100°C
120°C
Question 33 of 37
Which property of water is responsible for its high surface tension?
Choose 1 answer
Hydrogen bonding
Van der Waals forces
Ionic bonds
Covalent bonds
Question 34 of 37
What happens to the specific heat capacity of water as it cools down?
Choose 1 answer
Increases
Decreases
Stays the same
Becomes unpredictable
Question 35 of 37
What is the process by which water absorbs heat during melting called?
Choose 1 answer
Latent heat of fusion
Latent heat of vaporization
Specific heat capacity
Thermal conductivity
Question 36 of 37
What happens to water's boiling point at higher altitudes?
Choose 1 answer
Increases
Decreases
Stays the same
Becomes unpredictable
Question 37 of 37
What term describes the property of water that allows it to climb up small tubes against gravity?
Choose 1 answer
Capillary action
Surface tension
Cohesion
Adhesion
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