Unit 2-Bonding and VSEPR Flashcards
1
Q
- Which molecule is non polar ?
a) dihydrogen monoxide b) carbon tetra-iodide
c) ammonia
d) SCO
e) CF2CL2
A
B
2
Q
- Which INCORRECTLY completes this statement: A covalent bond …
a) exists between two nonmetals
b) exists between H and O in water
c) exists between the two fluorine atoms in the fluorine diatomic molecule/
d) must contain only one pair of electrons
e) exists between H and Cl in hydrogen chloride
A
D
3
Q
- Regarding a polar covalent bond, which statement is false?
a) The atoms are different.
b) The atoms differ in electronegativity. e)
The electrons are held more closely by the more electronegative atom.
d)
The electrons are completely transferred from one atom to the other.
e)
There is a partially positive and partially negative end of the bond.
A
D
4
Q
- In the VSEP model, valence pair around the central arom postion themselves to
a) maximize electron pair repulsion
b) reduce only bonding pair repulsion
c) reduce only nonbonding pair repulsion
d) make the angles between them as large as possible
A
D
5
Q
- Which bond is approaching “nonpolar covalent status” the most?
a) NO
b) SiCl
c) KCl
d) SiBr
e) CN
A
C
6
Q
- How many lone pairs of electrons are on the B atom in BFIBr?
a) 4
b) 2
c) 1
d) 3
e) 0
A
E
7
Q
- What is a valid representation of the most stable cation of the element with Z=13?
a) B3+
b) B3-
c) Al3+
d) Al3-
e) Al0
A
C
8
Q
- What is the stock number for lead in PbF2?
a) I
b) II
c) III
d) IV
e) 0
A
B
9
Q
- How many valence electrons are shared between the carbon and oxygen nuclei in carbon monoxide?
a) 1
b) 2
c) 4
d) 6
e) 0
A
D
10
Q
- What is the empirical formula of strontium sulphide?
a) SrSe
b) SeSr
c) SrS
d) Sr2S2
e) SSr2
A
C
11
Q
- Which molecule is POLAR?
a) N2
b) HI
c) CF4
d) CS2
e) CSe2
A
B
12
Q
- What is the charge of the most stable anion of Cl?
a) 2-
b) 1
c) 1-
d) 0
e) 2
A
C
13
Q
- What is the stock number of iron cation in FeI3?
a) I
b) II
c) III
d) IV
e) V
A
C
14
Q
- Which of the following contains an IONIC bond?
a) CF4
b) RBCl
c) H2O
d) NF3
e) CH4
A
B
15
Q
- The most stable ionic compound between Al and S has empirical formula
a) AlS
b) Al3S2
c) Al2S
d) Al2S4
e) Al2S3
A
E
16
Q
- The most stable ionic compound between Na and N has a empirical formula
a) NaN3
b) NaN2
c) Na3N
d) NNa
e) Na3N2
A
C
17
Q
- Which of the following is NOT correct?
a) CF4
b) BrCl
c) NBr3
d) I2O
e) BeF
A
E
18
Q
- In combining with oxygen, which one of the following elements would form the bond with the least percent ionic character?
a) Fr
b) Li
c) S
d) F
e) Be
A
C
19
Q
- The total number of electrons in molecule of N2O2 is
a) 2
b) 32
c) 28
d) 30
e) 38
A
D
20
Q
- The total number of valence electrons in a. molecule of H2O is
a) 2
b) 16
c) 8
d) 6
e) 18
A
C
21
Q
- The total number of valence electrons in a molecule of ICA3 is
a) 16
b) 2
c) 5
d) 8
e) 32
A
A
22
Q
- Which of the following bonds has a valence electrons shared equally by both atoms?
a) HCl
b) NO
c) KCl
d) OO
e) BrCl
A
D
23
Q
- Of the following elements, Which is the most electronegative?
a) CL
b) O
c) Se
d) P
e) He
A
B
24
Q
- Which of the following bonds be least polar?
a) KCl
b) SiCl
c) BrCl
d) ClO
e) CCl
A
C
25
Q
- List the atoms that carry a positive partial (or complete) charge (in each bond).
a) K, Si, Br, Cl, C
b) Cl, Si, Br, Cl, C
c) K, Si, Br, O, C
A
A
26
Q
- In degrees the tetrahedral angle is approximately
a) 90
b) 120
c) 107
d) 109
e) 180
A
D
27
Q
- The number of VSEPR groups around As in AsF3 is
a) 1
b) 2
c) 3
d) 4
e) 0
A
D
28
Q
- the electron group geometry of SO2 is
a) linear
b) trigonal planar
c) bent
d) pyramidal
e) tetrahedral
A
B
29
Q
- The molecular geometry of HCP is
a) bent
b) trigonal planar
c) linear
d) pyramidal
e) tetrahedral
A
E
30
Q
- An example of a polar molecule is
a) BCl3
b) CF4
c) O2
d) HCl
e) Cl4
A
D
