Christine Davis - IU8
Quiz by , created more than 1 year ago

Biology (Essential Chemistry of Life) Quiz on Water as an Essential Molecule of Life, created by Christine Davis - IU8 on 31/07/2017.

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Christine Davis - IU8
Created by Christine Davis - IU8 over 7 years ago
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Water as an Essential Molecule of Life

Question 1 of 6

2

Which of the following makes up a molecule of water?

Select one of the following:

  • One atom of hydrogen and one atom of oxygen

  • One atom of hydrogen and one atom of sodium

  • Two atoms of hydrogen and two atoms of oxygen

  • Two atoms of hydrogen and one atom of oxygen

Explanation

Question 2 of 6

2

Most of water's properties occur because it is:

Select one of the following:

  • A polar covalent bonded molecule

  • Made with oxygen

  • A polar ionic

  • Makes up 75% of the earth

Explanation

Question 3 of 6

2

Hydrogen bonds take place between the …

Select one of the following:

  • hydrogens of the water molecules

  • oxygen and oxygen of the water molecules

  • oxygen on one water molecule and the hydrogen of the other water molecule

  • oxygen and hydrogen of the same molecule

Explanation

Question 4 of 6

2

Which property of water is responsible for the variety of aquatic organisms throughout the various seasons?

Select one of the following:

  • adhesion

  • cohesion

  • High specific heat

  • Solid water is less dense than liquid water

Explanation

Question 5 of 6

1

Nuclear reactors can run into problems if the reactor and fuel rods get too hot. They will use water as a coolant to keep the reactor core at a proper temperature. What property of water is this demonstrating?

Select one of the following:

  • Cohesion

  • high specific heat

  • universal solvent

  • adhesion

Explanation

Question 6 of 6

1

A polar bond is created by unequally shared electrons. Nonpolar bonds are equally shared electrons. Which statement best explains why water will dissolve polar compounds and NOT non polar compounds?

Select one of the following:

  • Polar compounds are charged molecules with + and – ends. These charged areas will attract other charged areas of other molecules.

  • Polar and nonpolar are opposite molecules. Opposite molecules will dissolve opposites.

  • Polar molecules are like ice, they are very cold; nonpolar are warm

  • Ionic are the best to be dissolved because they have opposite charges.

Explanation

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