If the dipole moment is________ or smaller the molecule will be considered non-p
ID: 713598 • Letter: I
Question
If the dipole moment is________ or smaller the molecule will be considered non-polar.
0.1 debye
0.2 debye
0.3 debye
0.4 debye
If the inter-nuclear distance in Br2 is 218pm, what is the covalent radius of a bromine atom?
a) 160 pm
b) 218 pm
c) 109 pm
d) 65 pm
Which one of the following compounds is non-polar?
a) SF2
b) SF4
c) BF3
d) NF3
What is the ideal bond angle in PH3
180 degrees
120 degrees
109.5 degrees
90 degrees
Can a molecule with a central atom in trigonal bipyramidal electron group geometry have the formula AX2Y3 and be non-polar?
yes
no
you need to know the electronegativity of the central atom.
you need to know the electronegativities of X and Y.
What is the ideal bond F-Xe-F bond angle in xenon difluoride?
180 degrees
120 degrees
109.5 degrees
90 degrees
Which bonding pair will have the longest bond length?
C-N
C-O
C-F
C-Si
If the C-C bond length is 154 pm and the Se-Se bond length is 238 pm, which of the following values should be closest to the C-Se bond length
205 pm
119 pm
77 pm
196 pm
Which of the following statements best describes the expected bond lengths in AsF5?
all bond lengths will be the same.
none of the bond lengths will be the same.
the atoms bonded in the axial positions will have longer bond lengths than the atoms bonded in the equatorial positions.
the atoms bonded in the axial positions will have shorter bond lengths than the atoms bonded in the equatorial positions.
What is the unit most commonly used for dipole moment mesurements?
a) einstein
b) erg
c) joule
d) debye
0.1 debye
Explanation / Answer
1.0.1 debye or smaller
2. If the inter-nuclear distance in Br2 is 218pm
the covalent radius of a bromine atom = 218/2 = 109pm
3. BF3 is trigonal planar. so dipole moment is zero
c) BF3
4. in PH3 bonding involve in pure p -orbitals. So bond angle is 900
90 degrees
5.central atom in trigonal bipyramidal electron group geometry have the formula AX2Y3 and be non-polar
No
6. F-Xe-F bond angle in xenon difluoride
180 degrees
7. C-Si
8. If the C-C bond length is 154 pm and the Se-Se bond length is 238 pm
closest to the C-Se bond length = 154+238/2 = 196pm
196 pm
9. the atoms bonded in the axial positions will have longer bond lengths than the atoms bonded in the equatorial positions.
10. d) debye
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