Question 1

Which of the following bonds is the shortest?

Accepted Answer

$$\mathrm{N \equiv N}$$

Question 2

Place the following in order of increasing bond length: $$\mathrm{NO^-, NO, NO^+}$$

Accepted Answer

$$\mathrm{NO^+, NO, NO^-}$$

Question 3

Which of the following best defines electronegativity?

Accepted Answer

The ability of an atom to attract electrons to itself in a chemical bond

Question 4

Using periodic trends, place the following bonds in order of increasing ionic character: $$\mathrm{Si-S, Si-Cl, Si-P}$$

Accepted Answer

$$\mathrm{Si-P \u003c Si-S \u003c Si-Cl}$$

Question 5

Which of the following elements has the largest atomic radius?

Accepted Answer

Cs

Question 6

Which process requires the most energy?

Accepted Answer

$$\mathrm{P$$^{2+}$$(g) \rightarrow P$$^{3+}$$(g) + e^-}$$

Question 7

Which of the following compounds would have the highest lattice energy?

Accepted Answer

$$\mathrm{MgO}$$

Question 8

Estimate $$\Delta H_{rxn}$$ for the reaction: $$\mathrm{Br_2$(g) + C_2H_4(g) \rightarrow C_2H_4Br_2(g)}$$ using the following bond energies: $$\mathrm{Br-Br: 193\ kJ, C=C: 837\ kJ, C-Br: 276\ kJ, C-H: 414\ kJ}$$

Accepted Answer

$$-228\ \mathrm{kJ}$$

Question 9

Which of the following molecules has a Lewis structure that does NOT obey the octet rule?

Accepted Answer

$$\mathrm{SF_6$}$$

Question 10

How many lone pairs are on Sn in $$\mathrm{$$SnF_2$$}$$?

Accepted Answer

1

Question 11

What is the geometry around the central atom in $$\mathrm{$$BrF_3$$}$$?

Accepted Answer

T-shaped

Question 12

The VSEPR model predicts the O-S-O bond angle in $$\mathrm{SO_2$} to be$$:

Accepted Answer

Less than $$120^{\circ}$$ but greater than $$109.5^{\circ}$$

Question 13

Which of the following best describes a $$\pi$$ bond?

Accepted Answer

Side-by-side overlap of p orbitals

Question 14

Which of the following molecules can have cis and trans isomers?

Accepted Answer

$$\mathrm{CH_2CHCHCH_2}$$

Question 15

How many sigma and pi bonds are present in $$\mathrm{CH_2CHCH_2CH_3}$$?

Accepted Answer

8 sigma, 2 pi

Question 16

Which of the following would have $$sp^3$$ hybridization on atom A?

Accepted Answer

A in $$\mathrm{CH_4$}$$

Question 17

A molecule with $$sp^3$$ hybridization has what electron geometry?

Accepted Answer

Tetrahedral

Question 18

Which of the following elements has the largest ionization energy?

Accepted Answer

Chlorine

Question 19

Which of the following molecules is polar?

Accepted Answer

$$\mathrm{SF_4$}$$

Question 20

Which ion is most stable based on formal charge?

Accepted Answer

$$\mathrm{NOC^-}$$

General Chemistry Exam 4 Review: Bonding, Structure, and Periodic Properties

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