Quiz 2 Flashcards
Determine the number of pi bonds in CH3CN.
A) 0
B) 1
C) 2
D) 3
E) 4
C) 2
Identify the compound with the weakest bond.
A) H2
B) HF
C) HCl
D) HBr
E) HI
E) HI
Which of the following is closest to the C-O-C bond angle in CH3-O-CH3?
A) 180°
B) 120°
C) 109.5°
D) 90°
E) 160°
C) 109.5°
E) Carbons 4,5
The N-H bond in the ammonium ion, NH4+, is formed by the overlap of what two orbitals?
A) sp3-sp3
B) sp3-sp2
C) sp2-sp2
D) sp2-s
E) sp3-s
E) sp3-s
What orbitals overlap to create the H-C bond in CH3+?
A) sp3-sp3
B) sp2-sp3
C) s-p
D) s-sp2
E) s-sp3
D) s-sp2
Triethylamine [(CH3CH2)3N] is a molecule in which the nitrogen atom is ________ hybridized and the CNC bond angle is ________.
A) sp2, >109.5°
B) sp2, <109.5°
C) sp3, >109.5°
D) sp3, <109.5°
E) sp, 109.5°
D) sp3, <109.5°
The carbon-carbon double bond in ethene is ________ and ________ than the carbon-carbon triple bond in ethyne.
A) stronger; shorter
B) stronger; longer
C) weaker; shorter
D) weaker; longer
E) stronger; more polar
D) weaker; longer
In what type of orbital are the lone pair electrons of methoxide (CH3O-) found ?
A) s
B) p
C) sp
D) sp2
E) sp3
E) sp3
Identify the hybridization of the oxygen in CH3OCH3.
A) sp
B) sp2
C) sp3
D) sp4
E) sp5
C) sp3
Give the H-C-H bond angle in H2CO.
A) 60
B) 90
C) 109.5
D) 120
E) 180
D) 120
Each lone pair of electrons on the O atom in methanol (CH3OH) occupies a(n) ________ orbital.
A) s
B) p
C) sp
D) sp2
E) sp3
E) sp3
Which of the following molecules has the smallest dipole moment?
A) Br2
B) NH3
C) HCl
D) HBr
E) HI
A) Br2
Identify the hybridization of carbon in H2CO.
A) sp
B) sp2
C) sp3
D) sp4
E) s3p
B) sp2
The N-H single bond in methyl amine (CH3NH2) is a ________ bond formed by the overlap of a(n) ________ orbital on N and a(n) ________ orbital on H.
A) σ; sp2; s
B) σ ; sp3; s
C) π ; sp3; s
D) π ; sp2; p
E) π ; p ; p
B) σ ; sp3; s
A
How many distinct and degenerate p orbitals exist in the second electron shell, where n = 2?
A) 0
B) 1
C) 2
D) 3
E) 4
D) 3
The lone-pair electrons of the methyl anion occupy a(n) ________ orbital.
A) s
B) p
C) sp
D) sp2
E) sp3
E) sp3
What is the predicted shape, bond angle, and hybridization for +CH3?
A) trigonal planar, 120°, sp2
B) trigonal planar, 120°, sp3
C) trigonal planar, 109.5°, sp2
D) trigonal pyramidal, 120°, sp2
E) trigonal pyramidal, 109.5°, sp2
A) trigonal planar, 120°, sp2
Give the shape of the methyl radical.
A) trigonal pyramidal
B) tetrahedral
C) bent
D) linear
E) trigonal planar
E) trigonal planar
E) bond 5
A molecule of acetonitrile CH3CN contains ________ sigma bonds and ________ pi bonds.
A) 5, 2
B) 4,3
C) 4,2
D) 2,2
E) 4,0
A) 5, 2
B
D) ~ 120˚
