Question 1

Which of the following best describes the molecular geometry and bond angle of $$\mathrm{NH_3$} ($$ammonia)?

Accepted Answer

Trigonal pyramidal, $$107^\circ$$

Question 2

Which of the following compounds is classified as nonpolar covalent?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 3

What is the correct chemical formula for diphosphorus pentoxide?

Accepted Answer

$$\mathrm{P_2O_5}$$

Question 4

Which of the following best describes the trend of electronegativity in the periodic table?

Accepted Answer

Increases from left to right and decreases from top to bottom

Question 5

Which of the following is the correct balanced equation (with physical states) for the decomposition of water?

Accepted Answer

$$2\mathrm{H_2O}(l) \rightarrow 2\mathrm{H_2$}(g) + \mathrm{O_2$}(g)$$

Question 6

Which of the following compounds is insoluble in water according to the solubility guidelines?

Accepted Answer

$$\mathrm{$$PbCl_2$$}$$

Question 7

What is the correct name for $$\mathrm{Fe(NO_3$)_3}$$?

Accepted Answer

Iron(III) nitrate

Question 8

Which of the following is the correct net ionic equation for the reaction between $$\mathrm{$$AgNO_3$$(aq)}$$ and $$\mathrm{NaCl(aq)}$$?

Accepted Answer

$$\mathrm{Ag^+(aq) + Cl^-(aq) \rightarrow AgCl(s)}$$

Question 9

Which of the following best describes the bond in $$\mathrm{H_2$}$$?

Accepted Answer

Nonpolar covalent

Question 10

What is the oxidation number of chromium in $$\mathrm{$$CrO_3$$}$$?

Accepted Answer

+6

Question 11

Which of the following is the correct formula for the ammonium ion?

Accepted Answer

$$\mathrm{NH_4$^+}$$

Question 12

Which of the following reactions is a precipitation reaction?

Accepted Answer

$$\mathrm{$$AgNO_3$$(aq) + NaCl(aq) \rightarrow AgCl(s) + $$NaNO_3$$(aq)}$$

Question 13

What does VSEPR stand for and what does it describe?

Accepted Answer

Valence Shell Electron Pair Repulsion; it describes the arrangement of electron pairs around a central atom to minimize repulsion

Question 14

Which of the following is the correct name for $$\mathrm{CF_4$}$$?

Accepted Answer

Carbon tetrafluoride

Question 15

Which of the following compounds contains an ionic bond?

Accepted Answer

$$\mathrm{BaO}$$

Question 16

What is the correct balanced equation for the reaction of chlorine gas with potassium hydroxide to yield potassium chloride, water, and potassium chlorate?

Accepted Answer

$$3\mathrm{Cl_2$}(g) + 6\mathrm{KOH}(aq) \rightarrow 5\mathrm{KCl}(aq) + \mathrm{$$KClO_3$$}(aq) + 3\mathrm{H_2O}(l)$$

Question 17

Which of the following is the correct net ionic equation for the neutralization of hydrochloric acid with sodium hydroxide?

Accepted Answer

$$\mathrm{H^+(aq) + OH^-(aq) \rightarrow H_2O(l)}$$

Question 18

Which of the following best describes the oxidation number of oxygen in most compounds?

Accepted Answer

$$-2$$

Question 19

Which of the following is the correct formula for the dichromate ion?

Accepted Answer

$$\mathrm{Cr_2O_7$$^{2-}$$}$$

Study Guidance for GOB Chemistry: Naming Compounds, Solubility, and Oxidation Numbers

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