Reactions Properties I. $\text{Fe} \, (s) + 2\text{HCl} \, (aq) \rightarrow \text{FeCl}_2 \, (aq) + \text{H}_2 \, (g)$ $\text{Fe}$ is reductant II. $\text{Zn} \, (s) + \text{CuSO}_4 \, (aq) \rightarrow \text{ZnSO}_4 \, (aq) + \text{Cu} \, (s)$ $\text{Cu}$ is being reduced III. $\text{Br}_2 \, (l) + 2\text{I}^- \, (aq) \rightarrow 2\text{Br}^- \, (aq) + \text{I}_2 \, (s)$ $\text{Br}_2$ is reductant IV. $\text{CH}_4 \, (g) + 2\text{O}_2 \, (g) \rightarrow \text{CO}_2 \, (g) + 2\text{H}_2\text{O} \, (l)$ $\text{C}$ atom in $\text{CH}_4$ is oxidized
Which of the above pairs are correct?
I, II and IV
To determine which pairs of reactions and properties are correct, let's analyze each option individually:
- Reaction I: \(\text{Fe} \, (s) + 2\text{HCl} \, (aq) \rightarrow \text{FeCl}_2 \, (aq) + \text{H}_2 \, (g)\)
- Reaction II: \(\text{Zn} \, (s) + \text{CuSO}_4 \, (aq) \rightarrow \text{ZnSO}_4 \, (aq) + \text{Cu} \, (s)\)
- Reaction III: \(\text{Br}_2 \, (l) + 2\text{I}^- \, (aq) \rightarrow 2\text{Br}^- \, (aq) + \text{I}_2 \, (s)\)
- Reaction IV: \(\text{CH}_4 \, (g) + 2\text{O}_2 \, (g) \rightarrow \text{CO}_2 \, (g) + 2\text{H}_2\text{O} \, (l)\)
Based on the analysis, the correct pairs are I, II, and IV.
Important Questions from Redox Reactions
Nitric acid is reduced to nitrogen dioxide in which of the following reactions?
In reaction, 2Na2S2O3 + I2 → A + 2NaI; A will be _________.
The role of H3PO4 in the estimation of Fe(II) with K2Cr2O7 using diphenylamine sulphonate as indicator is to
- In the following redox reaction, which compound is acting as a reducing agent ?
$N_2H_4 + 2H_2O_2 \rightarrow N_2 + 4H_2O$ Number of electrons (x) involved in the following reaction is :
\(N \equiv N+ 8H^{+}+x \rightarrow 2N H^{3}+ H_{2}\)
