Chemistry Quiz on Water Molecule

What is the bond angle of a water molecule?

• 90°

• 104.5°

• 120°

• 180°

Why do the O-H bonds in a water molecule not cancel each other out, making the molecule polar?

• Because the molecule has a linear structure

• Because the hydrogen atoms are more electronegative than oxygen

• Because the molecule has a bent shape

• Because the molecule has a symmetrical arrangement

What property of water is due to its polarity and the resulting hydrogen bonds between water molecules?

• Water is a universal solvent

• Water has a high heat capacity

• Water exists as a liquid at room temperature

• All of the above

Tags

NGSS.MS-PS3-4

Which of the following is NOT a unique property of water?

• High heat of vaporization

• Viscosity

• Being the only known body in our solar system with liquid water existing freely on its surface

• Existing in all phases of matter: solid, liquid, and gas

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What is the significance of hydrogen bonding in water?

• It makes water less dense as a solid than as a liquid

• It contributes to water's high heat capacity

• It allows water to be a universal solvent

• All of the above

Tags

NGSS.MS-ESS2-4

At what temperature does water reach its highest density?

• 0°C

• 4°C

• 10°C

• 100°C

Why does ice float on liquid water?

• Because ice is more dense than liquid water

• Because ice has a hexagonal structure with open spaces

• Because ice has a higher temperature than water

• Because ice is heavier than water

What happens to the volume of water when it freezes?

• It decreases by 9%

• It remains the same

• It increases by 9%

• It doubles in size

Tags

NGSS.MS-PS1-4

Why is it important that ice is less dense than liquid water for aquatic life during winter?

• Because it allows fish and other organisms to swim freely

• Because it helps the ice melt faster

• Because it allows aquatic life to survive under the ice

• Because it makes the water warmer

What is the density of water at 4°C?

• 0.9168 g/cm³

• 0.9971 g/cm³

• 1.0000 g/cm³

• 0.9984 g/cm³