11 mark
Nitrous acid (HNO2) is produced when nitrogen dioxide dissolves in water to produce acid rain. What is the correct Lewis diagram for nitrous acid?
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Lewis Diagrams (College Board AP® Chemistry)
Exam Questions
13 mins10 questions
21 mark
Which of the species shown below does not have resonance structures?
benzene (C6H6)
carbonate ion (CO32-)
ethene (C2H4)
ozone (O3)
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31 mark
Which of the following compounds contains an atom that does not obey the octet rule?
CCl4
PCl3
NO3-
ClF3
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41 mark
Which compound contains an atom that does not obey the octet rule?
BF4-
SCl4
CS2
NOCl
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51 mark
What is the correct formula to work out the formal charge on an atom?
FC = (number of valence electrons) -
(number of bonding electrons) - (number of non-bonding electrons)FC = (number of valence electrons) + (number of bonding electrons) + (number of non-bonding electrons)
FC = (number of valence electrons) - (number of non-bonding electrons) - (number of bonding electrons)
FC = (number of valence electrons) -
(number of non-bonding electrons) - (number of bonding electrons)
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61 mark
What is the formal charge on atom 1 in the hydrogen phosphate ion, HPO42-?
0
-1
-2
1
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71 mark
What is the formal charge on atom 2 in the hydrogen phosphate ion, HPO42-?
0
-1
-2
1
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81 mark
What is the formal charge on atom 3 in the hydrogen phosphate ion, HPO42-?
0
-1
-2
1
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91 mark
How many lone pairs of electrons exist on I3-?
3
5
7
9
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