3. Which of the following would have a trigonal planar (or triangular) structure? :CH3 CH3 : NH3 BF3 :OH3 II III IV : A) I, II, and IV B) II and IV CIV D) II, IV, and-V E) All of these

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Chapter1: Chemical Foundations
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3.
Which of the following would have a trigonal planar (or triangular)
structure?
: CH3
CH3
: NH3
BF3
:OH3
II
III
IV
V
A) I, II, and IV
B) II and IV
ci-IV
II, IV, and-V
Ej All of these
4. Which structure (s) contain(s) an oxygen that bears a formal charge
of +1?
:0
H-C
CH3-0
:0:
CH3
II
III
IV
A) I and II
B) III and IV
C) v
D) II
E) I and v
5.
Which statement is true for the Fischer projection at the right?
CHCH3
CH3-
a)
the molecule is achiral,
the molecule has "S" stereochemistry.
b)
the molecule has "R stereochemistry.
c)
the molecule will rotate polarized light clockwise.
d)
the molecule will rotate polarized light counter-clockwise.
-OH
e)
6.
Which Fischer projections represent chiral molecules?
ÇH3
CH3
CH3
-CH3
H
ÇHBr
-Br
Br-
CH3-
C2H5
-Br
CH3
-Br
V
a) I, I, I, IV, V b) I, I, I, IV
c) I I
d) I, IV
e) V
Transcribed Image Text:3. Which of the following would have a trigonal planar (or triangular) structure? : CH3 CH3 : NH3 BF3 :OH3 II III IV V A) I, II, and IV B) II and IV ci-IV II, IV, and-V Ej All of these 4. Which structure (s) contain(s) an oxygen that bears a formal charge of +1? :0 H-C CH3-0 :0: CH3 II III IV A) I and II B) III and IV C) v D) II E) I and v 5. Which statement is true for the Fischer projection at the right? CHCH3 CH3- a) the molecule is achiral, the molecule has "S" stereochemistry. b) the molecule has "R stereochemistry. c) the molecule will rotate polarized light clockwise. d) the molecule will rotate polarized light counter-clockwise. -OH e) 6. Which Fischer projections represent chiral molecules? ÇH3 CH3 CH3 -CH3 H ÇHBr -Br Br- CH3- C2H5 -Br CH3 -Br V a) I, I, I, IV, V b) I, I, I, IV c) I I d) I, IV e) V
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