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Date	May 2011	Marks available	1	Reference code	11M.1.hl.TZ1.11
Level	HL	Paper	1	Time zone	TZ1
Command term	State	Question number	11	Adapted from	N/A

Question

Which species does not contain delocalized electrons?

A. ${\text{C}}{{\text{H}}_{\text{3}}}{\text{C}}{{\text{H}}_{\text{2}}}{{\text{O}}^ - }$

B. ${\text{C}}{{\text{H}}_{\text{3}}}{\text{CO}}_2^ -$

C. ${{\text{O}}_{\text{3}}}$

D. ${\text{NO}}_3^ -$

Markscheme

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Syllabus sections

Additional higher level (AHL) » Topic 14: Chemical bonding and structure » 14.1 Covalent bonding and electron domain and molecular geometries

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17M.2.hl.TZ1.8b: Suggest why the loss of ozone is an international environmental concern.
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16M.1.hl.TZ0.14: In which group do both compounds contain delocalized...
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15M.1.hl.TZ1.12: What is correct for ${\text{PC}}{{\text{l}}_{\text{5}}}$ ?
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14N.1.hl.TZ0.12: What is the correct number of sigma ${\text{(}}\sigma {\text{)}}$ and pi...
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14N.3.sl.TZ0.20a: Describe, using equations, the formation and depletion of ozone in the stratosphere by...
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13N.3.hl.TZ0.21b: The ozone layer has also been depleted by certain pollutants that have been released into the...
13M.1.hl.TZ1.11: Which combination best describes the type of bonding present and the melting point of silicon...
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09M.2.hl.TZ1.6a.i: ${\text{PC}}{{\text{l}}_{\text{3}}}$
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09M.2.hl.TZ2.5b.i: ${\text{SiF}}_6^{2 - }$
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11M.1.hl.TZ2.14: Which species does not have delocalized electrons? A. ${\text{NO}}_3^ -$ B. ...
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11N.2.sl.TZ0.6c: Nitrogen monoxide, NO, is involved in the decomposition of ozone according to the following...

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