Deck 1: Structure Determines Properties

Question 1

What is the ground state electron configuration of carbon?

A) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}_{\mathrm{x}}{ }^{1}$

B) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}_{\mathrm{x}}$

C) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}_{\mathrm{x}}{ }^{1} 2 \mathrm{p}_{\mathrm{y}}{ }^{1}$

D) $1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}_{\mathrm{x}}^{2} 2 \mathrm{p}_{\mathrm{y}}$

Answer 1

$1 \mathrm{~s}^{2} 2 \mathrm{~s}^{2} 2 \mathrm{p}_{\mathrm{x}}{ }^{1} 2 \mathrm{p}_{\mathrm{y}}{ }^{1}$

Question 2

Which one of the following is the conjugate base of $\mathrm{NH}_{3}$ ?

A) $\mathrm{NH}_{4}{ }^{+}$
B) $\mathrm{H}^{+}$
C) $\mathrm{N}^{3-}$
D) $\mathrm{NH}_{2}^{-}$

Answer 2

$\mathrm{NH}_{2}^{-}$

Question 3

Identify the condensed formula of the following structure:

A) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCHClCH}\left(\mathrm{CH}_{3}\right)_{2}$
B) $\mathrm{CH}_{3} \mathrm{CH}\left(\mathrm{CH}_{3}\right) \mathrm{CHClCH}\left(\mathrm{CH}_{3}\right)_{2}$
C) $\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCHClC}\left(\mathrm{CH}_{3}\right)_{3}$
D) $\left(\mathrm{CH}_{3}\right)_{3} \mathrm{CCHClCH}\left(\mathrm{CH}_{3}\right)_{3}$

Answer 3

$\left(\mathrm{CH}_{3}\right)_{2} \mathrm{CHCHClC}\left(\mathrm{CH}_{3}\right)_{3}$

Question 4

How many $\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}$ constitutional isomers are possible?

A) one
B) two
C) three
D) four

Question 5

The formal charges on the nitrogen and oxygen in the following structures are, respectively

A) $+1,-1$
B) $0,-1$
C) $+1,0$
D) 0,0

Question 6

In which of the following compounds would you expect $\mathrm{Cl}$ to have a partial positive charge?

A) $\mathrm{HCl}$
B) $\mathrm{CCl}_{4}$
C) $\mathrm{NaCl}$
D) $\mathrm{HOCl}$

Question 7

Which of the following species has(have) a linear geometry?
I. $\mathrm{CO}_{2}$
II. $\mathrm{NO}_{2}^{+}$
III. $\mathrm{NO}_{2}^{-}$

A) only I
B) only II
C) I and II
D) I, II, and III

Question 8

The $\mathrm{H}-\mathrm{C}-\mathrm{H}$ bond angles in ethylene, $\mathrm{C}_{2} \mathrm{H}_{4}$ , are closest to

A) $90^{\circ}$ .
B) $109.5^{\circ}$ .
C) $120^{\circ}$ .
D) $180^{\circ}$ .

Question 9

Give the molecular formula of the compound shown below:

A) $\mathrm{C}_{8} \mathrm{H}_{16} \mathrm{O}$
B) $\mathrm{C}_{9} \mathrm{H}_{18} \mathrm{O}$
C) $\mathrm{C}_{10} \mathrm{H}_{18} \mathrm{O}$
D) $\mathrm{C}_{10} \mathrm{H}_{20} \mathrm{O}$

Question 10

Which one of the following is the conjugate acid of ethanol?

A) Option A
B) Option B
C) Option C
D) Option D

Question 11

In the equilibrium below, the strongest base is:
$\left(\mathrm{pK}_{\mathrm{a}} \mathrm{H}_{2} \mathrm{O}=15.7, \mathrm{pK}_{\mathrm{a}} \mathrm{NH}_{3}=36\right)$
$\mathrm{H}_{2} \mathrm{O}+\stackrel{\ominus}{\mathrm{NH}_{2}} \rightleftharpoons \stackrel{\ominus}{\mathrm{OH}}+\mathrm{NH}_{3}$

A) $\mathrm{H}_{2} \mathrm{O}$
B) $\mathrm{NH}_{2}$
C) $\mathrm{OH}$
D) $\mathrm{NH}_{3}$

Question 12

Which one of the following mechanistically depicts the protonation of methanol by hydrogen bromide?

A)

B)

C)

D)

Question 13

Which one of the following has the largest acid equilibrium constant, $\mathrm{K}_{\mathrm{a}}$ ?

A)
B)
C)
D)

Question 14

For which of the following does the equilibrium favor reactants.

A) A
B) B
C) C
D) D

Question 15

Identify the resonance structure which results from the following "electron pair movements".

A)

B)

C)

D)