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Date	May 2010	Marks available	1	Reference code	10M.1.sl.TZ2.24
Level	SL	Paper	1	Time zone	TZ2
Command term		Question number	24	Adapted from	N/A

Question

In which species does sulfur have an oxidation number of 0?

A. ${\text{S}}{{\text{O}}_{\text{3}}}$

B. ${{\text{S}}_{\text{8}}}$

C. ${\text{N}}{{\text{a}}_{\text{2}}}{\text{S}}{{\text{O}}_{\text{4}}}$

D. ${{\text{H}}_{\text{2}}}{\text{S}}$

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Syllabus sections

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

Show 165 related questions

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17N.1.sl.TZ0.21: What are the oxidation states of chromium in (NH4)2Cr2O7 (s) and Cr2O3 (s)?
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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.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.
17M.2.sl.TZ1.1a.i: Suggest how the change of iodine concentration could be followed.
17M.1.hl.TZ1.29: A reaction takes place when a rechargeable battery is used: Pb(s) + PbO2(s) + 4H+(aq) +...
17M.1.hl.TZ1.28: Which change represents oxidation? A. HClO4 to HClO3 B. N2 to NH3 C. N2O to...
17M.1.sl.TZ1.22: What is the oxidation half-equation in the redox reaction? 2S2O32–(aq) + I2(aq) → S4O62–(aq)...
17M.1.sl.TZ1.21: What is the order of decreasing reactivity of the metals (most reactive first)? Zn(s) +...
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.TZ0.4g: Magnesium chloride can be electrolysed. Deduce the half-equations for the reactions at each...
16N.2.sl.TZ0.1b: Determine the average oxidation state of carbon in ethene and in...
16N.1.sl.TZ0.21: Which is a correct statement for the reaction below? 2MnO4-(aq) + 6H+(aq) + 5NO2-(aq) →...
16N.1.sl.TZ0.17: Which experimental methods could be used to observe the progress of the following...
16M.2.hl.TZ0.1b: Phosphine is usually prepared by heating white phosphorus, one of the allotropes of...
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:
15M.2.hl.TZ1.7a.iii: Deduce the half-equation for the oxidation of ethanol to ethanal.
15M.2.hl.TZ1.7a.iv: Deduce the overall redox equation for the reaction of ethanol to ethanal with acidified...
15M.2.hl.TZ2.8b.i: State the name of ${\text{C}}{{\text{r}}_{\text{2}}}{{\text{O}}_{\text{3}}}$ .
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15M.2.hl.TZ2.8d.i: The dichromate ion,...
15M.2.hl.TZ2.8d.ii: Explain in terms of oxidation numbers whether iodine is oxidized or reduced in part (d) (i).
15M.1.sl.TZ1.23: Which represents a redox reaction? A. ...
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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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15M.2.sl.TZ1.7c.ii: Determine the oxidation number of carbon in ethanol and ethanal. Ethanol: Ethanal:
15M.2.sl.TZ1.7c.iv: Deduce the overall redox equation for the reaction of ethanol to ethanal with acidified...
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...
14M.2.hl.TZ2.5c: (i) Deduce a balanced equation for the reaction between the chlorate(I) ion and sulfur...
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14M.2.sl.TZ1.6a: Define oxidation in terms of electron transfer.
14M.1.sl.TZ1.23: At which side of the equation are electrons, ${{\text{H}}^ + }$ ions and...
14M.1.sl.TZ1.24: What are the correct names for ${\text{KMn}}{{\text{O}}_{\text{4}}}$ 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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14N.3.hl.TZ0.24a: In an acidic soil, nitrate ions may undergo reduction to form ammonium ions. Deduce a...
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14N.1.sl.TZ0.24: Which statement is correct for the following...
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13N.1.hl.TZ0.31: What is the name of ${\text{Mn}}{{\text{O}}_{\text{2}}}$ ? A. Manganese(II) oxide B. ...
13N.1.hl.TZ0.32: Consider the following...
13N.2.hl.TZ0.6b.i: State the initial and final oxidation numbers of titanium and hence deduce whether it is...
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13N.1.sl.TZ0.24: Consider the following...
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13N.1.sl.TZ0.23: What is the name of...
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13N.2.sl.TZ0.5b.i: Deduce which of the species would react with titanium metal.
13N.2.sl.TZ0.5b.ii: Deduce the balanced equation for this reaction.
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13M.2.hl.TZ1.4d: Deduce the half-equation involving ethanedioic acid.
13M.2.hl.TZ1.7b.iv: Deduce the oxidation number of iron in...
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13M.2.sl.TZ1.4c: Identify the oxidizing and reducing agents. Oxidizing agent: Reducing agent:
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13M.2.hl.TZ2.7b.ii: Deduce the oxidizing and reducing agents in this reaction. Oxidizing agent: Reducing...
13M.2.hl.TZ2.7a: Define oxidation in terms of oxidation number.
13M.2.hl.TZ2.7b.i: Deduce the balanced chemical equation for the redox reaction of copper, Cu(s), with nitrate...
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13M.2.sl.TZ2.1d.i: Define the term reduction in terms of electrons.
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13M.2.sl.TZ2.1f.i: One titration was abandoned because a brown precipitate, manganese(IV) oxide, formed. State...
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09N.1.hl.TZ0.29: Which compound contains nitrogen with an oxidation number of +3? A. NH4Cl B. ...
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09N.3.sl.TZ0.C4a: State the change in oxidation number of the cadmium and deduce if it is acting as the...
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10M.2.sl.TZ1.5b: (i) Deduce the order of reactivity of the four metals, cadmium, nickel, silver and zinc...
10M.1.sl.TZ2.25: What is the reducing agent in the reaction...
10M.2.sl.TZ2.5c: (i) Determine the oxidation number of lead in Pb,...
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09M.2.hl.TZ1.7b.iii: ${{\text{[CoC}}{{\text{l}}_{\text{4}}}{\text{]}}^{2 - }}$
09M.2.hl.TZ1.7b.ii: ${\text{C}}{{\text{o}}_{\text{2}}}{{\text{(S}}{{\text{O}}_{\text{4}}}{\text{)}}_{\text{3}}}$
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09M.2.sl.TZ1.4b.i: State the oxidation number of manganese in ${\text{KMn}}{{\text{O}}_{\text{4}}}$ and in...
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.D3b.ii: State with a reason whether chromium in potassium dichromate(VI) is oxidised or reduced by...
09M.3.sl.TZ1.E2c.ii: State the change in oxidation number for manganese in step 2.
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09M.1.sl.TZ2.25: Which list represents the halogens in increasing order of oxidizing strength (weakest...
09M.1.sl.TZ2.12: Metal M has only one oxidation number and forms a compound with the formula...
09M.1.sl.TZ2.24: Which species is oxidized in the following...
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11M.1.hl.TZ1.36: What is the correct order of reaction types in the following sequence?
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11M.2.hl.TZ1.9e.ii: Deduce the oxidation and reduction half-equations and identify the oxidizing agent for the...
11M.1.sl.TZ1.23: Which species could be reduced to form ${\text{N}}{{\text{O}}_{\text{2}}}$ ? A. ...
11M.1.sl.TZ1.25: What happens to the manganese in the following...
11M.2.hl.TZ2.7b.ii: Deduce which species can reduce ${\text{S}}{{\text{n}}^{4 + }}{\text{(aq)}}$ to...
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11M.2.hl.TZ2.7d.ii: Deduce the oxidation number of chromium in...
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11M.1.sl.TZ2.24: Consider the following reactions of three unknown metals X, Y and...
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11M.2.sl.TZ2.2a.ii: Deduce one other common oxidation number exhibited by antimony in some of its compounds.
11M.2.sl.TZ2.2b.i: Deduce the chemical equations for these two reactions.
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