Unit 2. Chapter 9. Water-1-unique & hydrides

Water exists in a gaseous state at the Earth’s surface

• True

• False

Seawater is unable to be consumed by humans primarily because

• it is all contaminated with industrial waste

• it contains too much salt for human consumption.

Because it comes straight from natural sources, all freshwater is safe to drink

• True

• False

The majority of the available water on Earth is

• fresh water.

• salt water.

Which of the following is a group 16 hydride?

• H₂S

• KH

• CH₄

• CaH₂

Hydrogen telluride is a group 16 hydride. Its boiling point is ____ than the boiling point of water.

• greater

• lower

• simillar

Water’s high boiling point is primarily due to the presence of______between water molecules

• dispersion forces

• hydrogen bonds

• dipole-dipole interactions

• covalent bonds

Water in its gaseous state is present

• above natural hot springs.

• between clouds.

• in polar regions.

• All of the options correctly complete the statement.

Water’s boiling point is ____ ℃. This is considered relatively ____ compared to other group 16 hydrides.

• 44, low

• 44, high

• 100, low

• 100, high

H₂O contradicts the boiling point trend of other group 16 hydrides mainly because

• H₂O is the smallest molecule

• H₂O has the strongest dispersion forces between its molecules

• H₂O has hydrogen bonds between molecules.

• H₂O is V-shaped.