Q: Which of the following is the correct order of increasing electronegativity?

$\mathrm{Na} < \mathrm{Mg} < \mathrm{Al} < \mathrm{Cl}$

Q: Which of the following best describes the uncertainty principle?

It is impossible to simultaneously know both the exact position and exact momentum of an electron.

Q: Which of the following is the correct statement about resonance structures?

Resonance structures differ only in the arrangement of electrons, not the arrangement of atoms.

Q: Which of the following is the correct relationship between bond order and bond length?

As bond order increases, bond length decreases.

Q: Which of the following best describes the trend in atomic radius across a period from left to right?

Atomic radius decreases due to increasing nuclear charge.

Question 1

Which of the following compounds has the chemical formula for ammonium cyanate?

Accepted Answer

$\mathrm{NH_4NCO}$

Question 2

Which of the following bonds is the least polar?

Accepted Answer

$\mathrm{B-N}$

Question 3

Which statement is TRUE regarding the relationship between ionization energy (IE) and electron affinity (EA) trends in the periodic table?

Accepted Answer

Both IE and EA increase across a period and decrease down a group.

Question 4

Which of the following is the correct Lewis structure for $\mathrm{NO_2^-}$ (nitrite ion)?

Accepted Answer

A structure with one N=O double bond, one N–O single bond, and one lone pair on N, with each O having two lone pairs, and a negative charge delocalized over the two O atoms.

Question 5

Which of the following best describes the geometry of $\mathrm{SF_4}$ according to VSEPR theory?

Accepted Answer

Seesaw

Question 6

Which of the following statements about oxidizing and reducing agents is correct?

Accepted Answer

An oxidizing agent is reduced as it causes another species to be oxidized.

Question 7

What is the oxidation number of vanadium in $\mathrm{V_2O_5}$?

Accepted Answer

+5

Question 8

Which of the following best explains why phosphorus has a higher first ionization energy than sulfur?

Accepted Answer

Phosphorus has a half-filled p subshell, which is more stable and requires more energy to remove an electron.

Question 9

Which of the following molecules is expected to have a molecular dipole moment?

Accepted Answer

$\mathrm{SO_2}$

Question 10

A green laser line has a frequency of $5.4 	imes 10^{14}\ \mathrm{s}^{-1}$. What is its wavelength in nanometers (nm)? (Speed of light $c = 3.00 	imes 10^8\ \mathrm{m/s}$)

Accepted Answer

$556\ \mathrm{nm}$

Question 11

Which of the following is the correct electron configuration for a $\mathrm{Cu^{2+}}$ ion?

Accepted Answer

$[\mathrm{Ar}]\ 3d^9$

Question 12

Which of the following statements about the Bohr model of the hydrogen atom is correct?

Accepted Answer

The energy of an electron in a given orbit is quantized and given by $E_n = -\dfrac{2.18 	imes 10^{-18}\ \mathrm{J}}{n^2}$.

Question 13

Which of the following is the correct order of increasing electronegativity?

Accepted Answer

$\mathrm{Na} < \mathrm{Mg} < \mathrm{Al} < \mathrm{Cl}$

Question 14

Which of the following best describes the uncertainty principle?

Accepted Answer

It is impossible to simultaneously know both the exact position and exact momentum of an electron.

Question 15

Which of the following is the correct formula for calculating the energy of a photon?

Accepted Answer

$E = h 
u$

Question 16

Which of the following is the correct statement about resonance structures?

Accepted Answer

Resonance structures differ only in the arrangement of electrons, not the arrangement of atoms.

Question 17

Which of the following is the correct relationship between bond order and bond length?

Accepted Answer

As bond order increases, bond length decreases.

Question 18

Which of the following transitions in the hydrogen atom emits the highest energy photon?

Accepted Answer

$n=2 \rightarrow n=1$

Question 19

Which of the following is the correct formula for calculating the wavelength of light given its frequency?

Accepted Answer

$\lambda = \dfrac{c}{
u}$

Question 20

Which of the following best describes the trend in atomic radius across a period from left to right?

Accepted Answer

Atomic radius decreases due to increasing nuclear charge.

General Chemistry II: Exam II Study Guide and Practice Questions

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