Question 1

Which of the following is the correct name for the compound with the formula $$\mathrm{$$FeSO_4$$}$$?

Accepted Answer

Iron(II) sulfate

Question 2

What is the correct formula for ammonium phosphate?

Accepted Answer

$$\mathrm{(NH_4$)_3PO_4}$$

Question 3

Which of the following cations has only one possible charge?

Accepted Answer

$$\mathrm{Na^+}$$

Question 4

Which of the following is a polyatomic ion?

Accepted Answer

$$\mathrm{SO_4$^{2-}}$$

Question 5

What is the correct name for the compound $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 6

Which of the following molecules is non-polar?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 7

Which of the following best describes why covalent bonds form?

Accepted Answer

Atoms share electrons to achieve a stable octet of valence electrons.

Question 8

Which of the following is the correct Lewis structure for $$\mathrm{H_2O}$$?

Accepted Answer

Oxygen in the center with two single bonds to hydrogen and two lone pairs on oxygen.

Question 9

Which of the following molecules contains an expanded octet?

Accepted Answer

$$\mathrm{SF_6$}$$

Question 10

According to VSEPR theory, what is the molecular geometry and approximate bond angle of $$\mathrm{NH_3$}$$?

Accepted Answer

Trigonal pyramidal, $$107^\circ$$

Question 11

Which of the following best describes a dipole-dipole force?

Accepted Answer

An attraction between the positive end of one polar molecule and the negative end of another polar molecule.

Question 12

Which of the following molecules can form hydrogen bonds with water?

Accepted Answer

$$\mathrm{CH_3OH} ($$methanol)

Question 13

Which of the following is the strongest type of intermolecular force?

Accepted Answer

Hydrogen bonding

Question 14

Which of the following is an organic molecule?

Accepted Answer

$$\mathrm{C_2H_6} ($$ethane)

Question 15

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule containing only hydrogen and carbon atoms.

Question 16

Which of the following is the correct balanced equation for the combustion of methane ($$\mathrm{CH_4$}) in $$oxygen?

Accepted Answer

$$\mathrm{CH_4$ + 2O_2 \rightarrow CO_2$ + 2H_2O}$$

Question 17

Which of the following statements about alcohols is correct?

Accepted Answer

Small alcohols (like methanol and ethanol) are polar, but large alcohols with long carbon chains are mostly non-polar.

Question 18

Which of the following best describes London dispersion forces?

Accepted Answer

Temporary attractions between all molecules due to momentary shifts in electron density.

Question 19

Given the skeletal structure of a straight-chain alkane with 5 carbon atoms, how many hydrogen atoms are present in the molecule?

Accepted Answer

12

Question 20

Which of the following best explains why $$\mathrm{H_2O} is a $$polar molecule?

Accepted Answer

It has polar O-H bonds and a bent molecular geometry.

Chem 101: Ionic and Covalent Compounds, Molecular Polarity, and Chemical Reactions

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