Multiple Choice
In the reaction 2Al(s) + 3Br2(g) → 2AlBr3(s), which element is oxidized and which is reduced?
97
views
6. Chemical Quantities & Aqueous Reactions
Redox Reactions
Multiple Choice
Which of the following reactions is a redox reaction?
A
AgNO_3 + NaCl → AgCl + NaNO_3
B
2Na + Cl_2 → 2NaCl
C
CaCO_3 → CaO + CO_2
D
HCl + NaOH → NaCl + H_2O
Verified step by step guidance1
Identify what a redox reaction is: a chemical reaction involving the transfer of electrons, where one species is oxidized (loses electrons) and another is reduced (gains electrons).
Analyze each reaction to determine if there is a change in oxidation states of any elements:
For the reaction \(\mathrm{AgNO_3 + NaCl \rightarrow AgCl + NaNO_3}\), check the oxidation states of Ag, Na, Cl, and N before and after the reaction to see if any change occurs.
For the reaction \(\mathrm{2Na + Cl_2 \rightarrow 2NaCl}\), examine the oxidation states of Na and Cl on both sides to see if electrons are transferred.
For the reactions \(\mathrm{CaCO_3 \rightarrow CaO + CO_2}\) and \(\mathrm{HCl + NaOH \rightarrow NaCl + H_2O}\), similarly check if any element changes its oxidation state, indicating a redox process.
Related Videos
Related Practice
