The fundamental unit of most covalent compounds is the
sulfur trifluoride
·
What is the name of
the following compound?
SF3
A.sulfur fluoride
B.fluorine sulphide
C.trifluorosulphide
D.sulfur trifluoride
E.none of the above
Carbon dioxide
·
What is the name of
the following compound?
CO2
A.calcium oxide
B.carbon dioxide
C.dicobalt
D.dioxocarbon
E.calcium dioxide
Molecule
·
The fundamental unit
of most covalent compounds is the
A.molecule.
B.atom.
C.ion.
D.electron.
covalent, ionic, neither
·
Classify the following
bonds as ionic, covalent, or neither (O, atomic number 8; F, atomic number 9;
Na, atomic number 11; Cl, atomic number 17; U, atomic number 92).
O with F Ca with Cl Na with Na
A.ionic, covalent, neither
B.neither, ionic, covalent
C.covalent, ionic, neither
D.covalent, ionic, covalent
a very electronegative atom and a weakly electronegative atom
are covalently bond
Which of the following statements best describes a relatively
polar bond?
·
A.two very electronegative atoms are covalently bound
B.two very electronegative atoms undergo ionic bonding
C.two weakly electronegative atoms undergo ionic bonding
D.a very electronegative atom and a weakly electronegative atom are covalently
bound
E.none of the above
H-F
·
Which of the following
molecules contains a polar bond?
A.H-H
B.H-F
C.F-F
D.Cl-Cl
E.all of the above
C-F
·
Which of the following
bonds would be the most polar?
A.C-Br
B.C-I
C.C-F
D.C-Cl
E.All are equally polar.
C-H
·
Which of the following
bonds would be the least polar?
A.C-F
B.C-Cl
C.C-O
D.C-H
E.All are equally polar.
PH3
·
Which of the following
molecules should have the same molecular shape and approximate bond angles as
ammonia, NH3?
A.SO3
B.CH4
C.NO2
D.PH3
E.BH3
N-O< N-N< N-F<H-F
·
List the following
bonds in order of increasing polarity:
A.N-N < N-O < N-F < H-F
B.N-N < N-O < H-F < N-F
C.N-O < N-N < N-F < H-F
D.H-F < N-F < N-O < N-N
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