Match List I with List II $\begin{array}{|l|l|l|l|} \hline & \text{List-I} & & \text{List-II} \\ \hline &…

Match List I with List II $\begin{array}{|l|l|l|l|} \hline & \text{List-I} & & \text{List-II} \\ \hline & \text{(Name of the test)} & & \text{(Reaction sequence involved) [M is metal]} \\ \hline \text { A. } & \text { Borax bead test } & \text { I. } & MCO_3 \rightarrow MO \xrightarrow{Co(NO_3)_2} CoO \cdot MO \\ \hline \text { B. } & \begin{array}{l} \text { Charcoal } \\ \text { cavity test } \end{array} & \text { II. } & MCO_3 \rightarrow MCl_2 \rightarrow M^{2+} \\ \hline \text { C } & \begin{array}{l} \text { Cobalt nitrate } \\ \text { test } \end{array} & \text { III } & MSO_4 \xrightarrow[\Delta]{Na_2 B_4 O_7} M(BO_2)_2 \rightarrow MBO_2 \rightarrow M \\ \hline \text { D. } & \text { Flame test } & \text { IV } & MSO_4 \xrightarrow[\Delta]{Na_2 CO_3} MCO_3 \rightarrow MO \rightarrow M \\ \hline \end{array}$ Choose the correct answer from the options given below:
  1. A-III, B-II, C-IV, D-I
  2. A-III, B-IV, C-I, D-II
  3. A-III, B-I, C-II, D-IV
  4. A-III, B-I, C-IV, D-II

Solution

Cobalt nitrate test $\mathrm{MCO}_3 \rightarrow \mathrm{MO} \xrightarrow[+\Delta]{\mathrm{Co}\left(\mathrm{NO}_3\right)_2}$ CoO. $\mathrm{MO}$ Flame test $\mathrm{MCO}_3 \rightarrow \mathrm{MCl}_2 \rightarrow \mathrm{M}^{2+}$ Borax Bead test $\mathrm{MSO}_4 \underset{\Delta}{\mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_7} \mathrm{M}\left(\mathrm{BO}_2\right)_2 \rightarrow \mathrm{MBO}_2 \rightarrow \mathrm{M}$ Charcoal cavity test $\mathrm{MSO}_4 \xrightarrow[\Delta]{\mathrm{Na}_2 \mathrm{CO}_3} \mathrm{MCO}_3 \rightarrow \mathrm{MO} \rightarrow \mathrm{M}$

Asked in: JEE Main 2024 (08 Apr Shift 1)

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