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Date	November 2014	Marks available	1	Reference code	14N.1.sl.TZ0.23
Level	SL	Paper	1	Time zone	TZ0
Command term		Question number	23	Adapted from	N/A

Question

Which species of vanadium has a different oxidation number from the rest?

A. ${\text{VO}}_2^ +$

B. ${\text{VO}}_3^ -$

C. ${{\text{V}}_{\text{2}}}{{\text{O}}_{\text{5}}}$

D. ${\text{V}}{{\text{O}}^{2 + }}$

Markscheme

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Syllabus sections

Core » Topic 9: Redox processes » 9.1 Oxidation and reduction

Show 165 related questions

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17M.2.hl.TZ1.4d: Suggest why experiments involving tetracarbonylnickel are very hazardous.
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17M.2.hl.TZ1.4a: Formulate an equation for the oxidation of nickel(II) sulfide to nickel(II) oxide.
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17M.2.hl.TZ1.3b.i: Identify, from the table, a non-vanadium species that can reduce VO2+(aq) to V3+(aq) but no...
17M.2.sl.TZ1.3b: Formulate an equation for the reaction between VO2+(aq) and V2+(aq) in acidic solution to...
17M.2.sl.TZ1.3a: Determine the oxidation state of vanadium in each of the following species.
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17M.1.hl.TZ1.28: Which change represents oxidation? A. HClO4 to HClO3 B. N2 to NH3 C. N2O to...
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16N.3.sl.TZ0.1c: Despite widespread improvements in the provision of safe drinking water, the sale of bottled...
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16N.2.sl.TZ0.1b: Determine the average oxidation state of carbon in ethene and in...
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16N.1.sl.TZ0.17: Which experimental methods could be used to observe the progress of the following...
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16M.2.sl.TZ0.1b: Phosphine is usually prepared by heating white phosphorus, one of the allotropes of...
16M.1.hl.TZ0.30: Applying IUPAC...
16M.1.sl.TZ0.21: Applying IUPAC rules, what is the name of MnO2? A. Magnesium(II) oxide B. Manganese(II)...
15M.1.hl.TZ1.30: Which represents a redox reaction? A. ...
15M.1.hl.TZ2.30: Which is a redox reaction? A. ...
15M.2.hl.TZ1.6e: Bromine reacts with aqueous sodium...
15M.2.hl.TZ1.7a.ii: Determine the oxidation number of carbon in ethanol and ethanal. Ethanol: Ethanal:
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15M.2.hl.TZ1.7a.iv: Deduce the overall redox equation for the reaction of ethanol to ethanal with acidified...
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15M.1.sl.TZ1.23: Which represents a redox reaction? A. ...
15M.1.sl.TZ1.24: Which species can oxidize ethanol to ethanoic acid? A. ${{\text{I}}^ - }$ B. ...
15M.1.sl.TZ2.23: What are the oxidation states of each element in...
15M.1.sl.TZ2.24: What is the coefficient for I– when the following equation is balanced using the smallest...
15M.2.sl.TZ1.2d: Bromine reacts with aqueous sodium...
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14M.1.hl.TZ2.31: Which species are the oxidizing and reducing agents in the following...
14M.2.hl.TZ1.6a: Alcohols with the molecular formula...
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14M.1.sl.TZ1.23: At which side of the equation are electrons, ${{\text{H}}^ + }$ ions and...
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14M.2.sl.TZ2.4d: (i) Deduce the coefficients required to balance the half-equations given below. ___...
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13N.1.hl.TZ0.32: Consider the following...
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13N.1.sl.TZ0.23: What is the name of...
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13M.2.hl.TZ1.4d: Deduce the half-equation involving ethanedioic acid.
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13M.2.hl.TZ2.7c.iii: Deduce a balanced chemical equation, including state symbols, for the overall reaction which...
13M.1.sl.TZ2.23: Which statement describes a reducing agent? A. It is reduced and gains electrons. B. ...
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12N.1.sl.TZ0.23: What is the correct systematic name of MnO2? A. Manganese(II) oxide B. ...
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10N.1.hl.TZ0.30: Consider the following...
10N.1.hl.TZ0.31: The following equations indicate reactions that occur...
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09M.2.sl.TZ1.4b.ii: Deduce which species has been oxidized in this reaction and state the change in oxidation...
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09M.3.sl.TZ1.E2c.ii: State the change in oxidation number for manganese in step 2.
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11M.1.sl.TZ1.25: What happens to the manganese in the following...
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