Chemistry · 2024
JEE Main · 8 April 2024, Shift 1 · Q72
Match List I with List II Choose the correct answer from the options given below:
Match List I with List II
Choose the correct answer from the options given below:
| LIST I (Name of the test) | LIST II (Reaction sequence involved)[ M is metal] | ||
| A. | Borax bead test | I. | $\displaystyle \mathrm{MCO}_3 \rightarrow \mathrm{MO} \xrightarrow[+\Delta]{\mathrm{Co}\left(\mathrm{NO}_3\right)_2} \mathrm{CoO} \cdot \mathrm{MO}$ |
| B. | Charcoal cavity test | II. | $\displaystyle \mathrm{MCO}_3 \rightarrow \mathrm{MCl}_2 \rightarrow \mathrm{M}^{2+}$ |
| C. | Cobalt nitrate test | III. | $\displaystyle \mathrm{MSO}_4 \xrightarrow[\Delta]{\mathrm{Na}_2 \mathrm{~B}_4 \mathrm{O}_7} \mathrm{M}\left(\mathrm{BO}_2\right)_2 \rightarrow \mathrm{MBO}_2 \rightarrow \mathrm{M}$ |
| D. | Flame test | IV. | $\displaystyle \mathrm{MSO}_4 \xrightarrow[\Delta]{\mathrm{Na}_2 \mathrm{CO}_3} \mathrm{MCO}_3 \rightarrow \mathrm{MO} \rightarrow \mathrm{M}$ |
Official answer
From NTA’s final answer key for this paper.
(4)
A-III, B-IV, C-I, D-II
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JEE Main 2024 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.