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Oxidation-Reduction Reactions Questions - All Grades

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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. $H_2C_2O_4 (aq) rarr 2CO_2 (g) + 2H^(+) (aq)$
The oxidation number of I in HOI is                .
1. $-1$
2. $0$
3. $-2$
4. $+1$
Which chemical equation shows 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 represents the total oxidation state for 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.
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.
Which of the following always occurs in an oxidation-reduction reaction?
1. a reactant loses a proton
2. a reactant loses two neutrons
3. a reactant gains sulfur
4. a reactant gains protons and neutrons
5. one reactant gains electrons, and the other reactant(s) lose an equal number of electrons
What would the oxidation number of a xenon atom be, and what would this oxidation number 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.
The oxidation number of Cl in $KClO_3$ is                .
1. $-1$
2. $-5$
3. $+1$
4. $+5$
The oxidation number of H in $AlH_3$ is                .
1. $+1$
2. $-1$
3. $+3$
4. $0$
What is the oxidation number of V in $(V_2O_7) ^(4-)$?
1. $+5$
2. $+3$
3. $+2$
4. $+1$
$3H_3AsO_3(aq) + BrO_3^(-) (aq) rarr Br^(-) (aq) + 3H_3AsO_4(aq)$?
1. $BrO_3^(-) (aq)$
2. $H_3AsO_3$
3. $Br^(_) (aq)$
4. $H_3AsO_4$