Chemistry of Water Quiz - Understand the Properties of H2O

Question 1 of 37

What is the chemical formula of water?

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H2O

H2O2

Question 2 of 37

Which type of bond holds the hydrogen and oxygen atoms together in a water molecule?

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Ionic bond

Covalent bond

Hydrogen bond

Van der Waals bond

Question 3 of 37

What is the shape of a water molecule?

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Linear

Trigonal planar

Tetrahedral

Bent

Question 4 of 37

What is the pH level of pure water at 25°C?

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Question 5 of 37

Water has a high boiling point compared to other similar-sized molecules due to what property?

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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?

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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?

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Question 8 of 37

What is the density of water at 4°C?

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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?

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Vaporization

Condensation

Freezing

Melting

Question 10 of 37

Which of the following is a property of water due to its hydrogen bonding?

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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?

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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?

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Evaporation

Condensation

Sublimation

Freezing

Question 13 of 37

What happens to water density as it freezes?

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Increases

Decreases

Stays the same

Becomes unpredictable

Question 14 of 37

In which state of matter does water have the highest density?

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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?

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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?

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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?

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Sublimation

Deposition

Melting

Freezing

Question 18 of 37

How does the addition of salt to water affect its boiling point?

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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?

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Liquid water

Ice

Water vapor

Salt water

Question 20 of 37

What is the term for water's ability to cling to other substances?

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Cohesion

Adhesion

Surface tension

Viscosity

Question 21 of 37

What is the term for the heat required to change water from liquid to solid?

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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?

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Solvent

Reactant

Temperature regulator

All of the above

Question 23 of 37

What phenomenon explains the rise of water in capillary tubes?

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Capillary action

Surface tension

Hydrogen bonding

Evaporation

Question 24 of 37

What is the effect of adding an acid to water?

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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?

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Electrolysis

Hydrolysis

Oxidation

Reduction

Question 26 of 37

What is the maximum density of water?

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0°C

4°C

10°C

25°C

Question 27 of 37

Which property of water allows it to act as a universal solvent?

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Polarity

Hydrogen bonding

Covalent bonding

Surface tension

Question 28 of 37

What is the term for the attraction between water molecules?

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Hydrogen bonding

Cohesion

Adhesion

Van der Waals forces

Question 29 of 37

Which property of water is responsible for its high heat capacity?

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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?

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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?

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Condensation

Evaporation

Sublimation

Freezing

Question 32 of 37

What is the boiling point of water at standard atmospheric pressure?

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50°C

75°C

100°C

120°C

Question 33 of 37

Which property of water is responsible for its high surface tension?

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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?

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Increases

Decreases

Stays the same

Becomes unpredictable

Question 35 of 37

What is the process by which water absorbs heat during melting called?

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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?

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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?

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Capillary action

Surface tension

Cohesion

Adhesion

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