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You can create printable tests and worksheets from these Grade 11 Oxidation-Reduction Reactions questions! Select one or more questions using the checkboxes above each question. Then click the add selected questions to a test button before moving to another page.

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Consider the following redox reaction

$H_2C_2O_4 (aq) + MnO_4^(-) (aq) rarr CO_2(g) + Mn^(2+) (aq)$

What is the reduction half reaction for this redox reaction?
1. $(Mn)^(7+) (aq) rarr Mn^(2+) (aq)$
2. $H_2C_2O_4 (aq) rarr CO_2(g)$
3. $(MnO_4)^(-) (aq) + 8H^(+) (aq) rarr Mn^(2+) (aq) + 4H_2O (l)$
4. $H_2C_2O_4 (aq) rarr 2CO_2 (g) + 2H^(+) (aq)$
Identify the reducing agent in the following reaction:

$I_2(aq) + 2S_2O_3^(2-) (aq) rarr S_4O_6^(2-) (aq) + 2I^(-) (aq)$
1. $(S_2O_3)^(2-)$
2. $I_2$
3. $(S_4O_6)^(2-)$
4. $I^(-)$
Which of the following chemical equations represents a redox reaction?
1. $CH_3COOH + NaOH -> CH_3COONa + H_2O$
2. $Cl^(-) + Ag^(+) ->AgCl darr$
3. $5Fe^(2+) + MnO_4^(1-) + 8H_3O^+ rArr6Fe^(3+) + Mn^(2+) + 12H_2O$
4. $HCl + NaOH -> NaCl + H_2O$
What is the sum of the oxidation states in an ionic compound?
1. It equals the charge of the cation
2. It equals the charge of the anion
3. It is equivalent to the magnitude of the ion with the higher charge
4. It equals zero
What is one characteristic feature of an oxidizing agent?
1. It undergoes reduction
2. Causes reduction
3. Donates electron
4. It itself undergoes oxidation
Consider the following redox reaction:

$CH_4 (g) + O_2(g) rarr CO_2(g) + 2H_2O (l)$

What is the change in the oxidation number of carbon in this reaction?
1. It increases from -4 to +4
2. It decreases from +4 to 0
3. It increases from +4 to -3
4. It decreases from +4 to -2
What is the oxidation number of Xe, and what does it suggest?
1. Its oxidation number is 8, making it inert
2. Its oxidation number is 0, making it nonreactive
3. Its oxidation number is 7, making it reactive
4. Its oxidation number is 0, making it reactive
Which of the following half-reactions involves oxidation?
1. Fe in $Fe(OH)_2 rarr Fe(OH)_3$
2. V in $VO^(2+) (aq) rarr V^(3+) (aq)$
3. Cl in $OCl^(-) (aq) rarr Cl^(-) (aq)$
Identify the oxidant in the following reaction:

$C_4H_4O_6^(2-) (aq) + ClO_3^(-) (aq) rarr CO_3^(2-) (aq) + Cl^(-) (aq)$
1. $(ClO_3)^(-)$
2. $(C_6H_4O_6)^(2-)$
3. $(CO_3)^(2-)$
4. $Cl^(_)$
$3H_3AsO_3(aq) + BrO_3^(-) (aq) rarr Br^(-) (aq) + 3H_3AsO_4(aq)$
1. $BrO_3^(-) (aq)$
2. $H_3AsO_3$
3. $Br^(_) (aq)$
4. $H_3AsO_4$