It must have a dipole moment. $$\text{Dipole moment} \neq 0$$

Question 1

Which of the following is required for a molecule to be considered polar?

Accepted Answer

It must have a dipole moment. 
$$	ext{Dipole moment} 
eq 0$$

Question 2

What best describes an ionic bond?

Accepted Answer

A bond where one atom steals an electron from another atom.

Question 3

Which of the following statements about ions is correct?

Accepted Answer

An ion is an atom or group of atoms that has gained or lost an electron.

Question 4

If a sodium atom loses one electron, what is the resulting charge?

Accepted Answer

$$+1$$

Question 5

Which of the following best describes hydrogen bonding?

Accepted Answer

A hydrogen atom with a partial positive charge is attracted to a different electronegative atom with a partial negative charge nearby.

Question 6

Which of the following is a real-life example of hydrogen bonding?

Accepted Answer

The attraction between water molecules in liquid water.

Question 7

Which of the following would NOT result in the formation of an ion?

Accepted Answer

An atom gaining a neutron.

Question 8

A chlorine atom gains one electron. What is the resulting ion called and what is its charge?

Accepted Answer

An anion with a $$-1$$ charge.

Question 9

Which of the following is a necessary condition for hydrogen bonding to occur?

Accepted Answer

A hydrogen atom must be covalently bonded to an electronegative atom.

Question 10

Which of the following best explains why water has a high boiling point compared to other molecules of similar size?

Accepted Answer

Water molecules form hydrogen bonds with each other, requiring more energy to break.

Question 11

Which of the following is true about dipole moments?

Accepted Answer

A molecule with a dipole moment has an uneven distribution of charge.

Question 12

Which of the following scenarios would most likely result in the formation of an ionic bond?

Accepted Answer

A sodium atom loses an electron to a chlorine atom.

Question 13

Which of the following is a correct statement about the charges involved in hydrogen bonding?

Accepted Answer

The hydrogen atom has a partial positive charge, and the electronegative atom has a partial negative charge.

Question 14

Which of the following best describes the difference between ionic and hydrogen bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons, while hydrogen bonds are attractions between partial charges.

Question 15

Which of the following molecules is most likely to form hydrogen bonds with water?

Accepted Answer

Ammonia ($$\mathrm{NH_3$})$$

Chemical Bonds and Polarity in Biological Molecules

Study Guide - Practice Questions