Match List I with List-II List-I (Name of the test) List-II(Reaction sequence involved) --- --- 1 Borax bead test I. MC O 3 to MO underset + \!\!Δ\!\! \!\! \!\! mathop overset Co ( N O 3 ) 2 \!\! \!\! mathop to \, \, CoO. MO 2 Charcoal cavity test II. MC O 3 to MC l 2 to M 2+ 3 Cobalt nitrate III MS O 4 frac N a 2 \!\! \!\! B 4 O 7 \!\!Δ\!\! M ( B O 2 ) 2 to MB O 2 to M 4 Flame test IV MS O 4 underset \!\!Δ\!\! mathop N a 2 C O 3 \, MC O 3 to MO to M Choose the correct answer from the option below :

Chemistry · Practical Inorganic chemistry (Qualitative Analysis)

JEE Main 2024 — 8 April, Shift 1 — Question 61

Match List I with List-II

List-I (Name of the test)	List-II(Reaction sequence involved)
1 Borax bead test	I. $\text{MC}{{\text{O}}_{3}}\to \text{MO}$ $\underset{+\text{ }\!\!\Delta\!\!\text{ }\!\!~\!\!\text{ }}{\mathop{\overset{\text{Co}{{\left( \text{N}{{\text{O}}_{3}} \right)}_{2}}\text{ }\!\!~\!\!\text{ }}{\mathop{\to }}\,}}\,$ CoO. MO
2 Charcoal cavity test	II. $\text{MC}{{\text{O}}_{3}}\to \text{MC}{{\text{l}}_{2}}\to {{\text{M}}^{2+}}$
3 Cobalt nitrate	III $\text{MS}{{\text{O}}_{4}}\frac{\text{N}{{\text{a}}_{2}}\text{ }\!\!~\!\!\text{ }{{\text{B}}_{4}}{{\text{O}}_{7}}}{\text{ }\!\!\Delta\!\!\text{ }}$ $\text{M}{{\left( \text{B}{{\text{O}}_{2}} \right)}_{2}}\to \text{MB}{{\text{O}}_{2}}\to \text{M}$
4 Flame test	IV $\text{MS}{{\text{O}}_{4}}\underset{\text{ }\!\!\Delta\!\!\text{ }}{\mathop{\text{N}{{\text{a}}_{2}}\text{C}{{\text{O}}_{3}}}}\,\text{MC}{{\text{O}}_{3}}\to$ $\text{MO}\to \text{M}$

Choose the correct answer from the option below :

Option A:
A-III, B-I, C-IV, D-II
Option B:
A-III, B-II, C-IV, D-I
Option C:
A-III, B-I, C-II, D-IV
Option D:
A-III, B-IV, C-I, D-II
Correct

Answer: D

Step-by-step solution

Cobalt nitrate test

$\mathrm{MCO}_{3} \rightarrow \mathrm{MO} \xrightarrow[+\Delta]{\mathrm{Co}\left(\mathrm{NO}_{3}\right)_{2}} \mathrm{CoO} . \mathrm{MO}$

Flame test

$\mathrm{MCO}_{3} \rightarrow \mathrm{MCl}_{2} \rightarrow \mathrm{M}^{2+}$

Borax Bead test

$\mathrm{MSO}_{4} \xrightarrow[\Delta]{\mathrm{Na}_{2} \mathrm{~B}_{4} \mathrm{O}_{7}} \mathrm{M}\left(\mathrm{BO}_{2}\right)_{2} \rightarrow \mathrm{MBO}_{2} \rightarrow \mathrm{M}$

Charcoal cavity test

$\mathrm{MSO}_{4} \xrightarrow[\Delta]{\mathrm{Na}_{2} \mathrm{CO}_{3}} \mathrm{MCO}_{3} \rightarrow \mathrm{MO} \rightarrow \mathrm{M}$

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Exam: JEE Main 2024
Paper: 8 April, Shift 1
Subject: Chemistry
Chapter: Practical Inorganic chemistry (Qualitative Analysis)
Topic: Other Misc Reactions/ Tests

Match List I with List II List-I (Compound) List-II (Colour) --- --- --- --- A F e 4 [ Fe( CN) 6 ] 3× x H 2 O I. Violet B. [ Fe( CN) 5 NOS…

Answer: D

Step-by-step solution

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