Which of the following is not an oxidation-reduction reaction?

  • A
    $H_{2} + Br_{2} \longrightarrow 2HBr$
  • B
    $NaCl + AgNO_{3} \longrightarrow NaNO_{3} + AgCl$
  • C
    $2Na_{2}S_{2}O_{3} + I_{2} \longrightarrow Na_{2}S_{4}O_{6} + 2NaI$
  • D
    $Cl_{2} + H_{2}O \longrightarrow HCl + HOCl$

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Similar Questions

The unbalanced chemical reactions given in List-$I$ show missing reagent or condition $(?)$ which are provided in List-$II$. Match List-$I$ with List-$II$ and select the correct answer using the code given below the lists:
List-$I$ List-$II$
$P. \ PbO_2 + H_2SO_4 \xrightarrow{?} PbSO_4 + O_2 + \text{other product}$ $1. \ NO$
$Q. \ Na_2S_2O_3 + H_2O \xrightarrow{?} NaHSO_4 + \text{other product}$ $2. \ I_2$
$R. \ N_2H_4 \xrightarrow{?} N_2 + \text{other product}$ $3. \ \text{Warm}$
$S. \ XeF_2 \xrightarrow{?} Xe + \text{other product}$ $4. \ Cl_2$

Codes: $P \quad Q \quad R \quad S$

$HNO_2$ acts as

Acidified $KMnO_4$ is decolourised by:

Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$Na_2CO_3 + Pb(NO_3)_2 \longrightarrow PbCO_3 \downarrow + 2NaNO_3$

How many electrons $(e^-)$ are gained by the oxidizing agent $KMnO_4$ to convert into $MnO_4^{2-}$,$MnO_2$,$Mn_2O_3$,and $Mn^{2+}$ respectively?

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