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Coordination Compounds question

2024 · 8 Apr · Shift 1 · Q20
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Coordination Compounds question

2024 · 8 Apr · Shift 1 · Q20

JEE MainChemistryCoordination CompoundsMCQ+4 / −1

Match List I with List II

LIST I
(Compound)		 LIST II
(Colour]
A. Fe4[Fe(CN)6]3⋅xH2O\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3 \cdot \mathrm{xH_2O}Fe4​[Fe(CN)6​]3​⋅xH2​O I. Violet
B. [Fe(CN)5NOS]4−\left[\mathrm{Fe}(\mathrm{CN})_5 \mathrm{NOS}\right]^{4-}[Fe(CN)5​NOS]4− II. Blood Red
C. [Fe(SCN)]2+[\mathrm{Fe}(\mathrm{SCN})]^{2+}[Fe(SCN)]2+ III. Prussian Blue
D. (NH4)3PO4⋅12MoO3\left(\mathrm{NH}_4\right)_3 \mathrm{PO}_4\cdot12 \mathrm{MoO}_3(NH4​)3​PO4​⋅12MoO3​ IV. Yellow

Choose the correct answer from the options given below:

  1. A
    A-IV, B-I, C-II, D-III
  2. B
    A-I, B-II, C-III, D-IV
  3. C
    A-II, B-III, C-IV, D-I
  4. D
    A-III, B-I, C-II, D-IV
View written solutionFree

Correct answer: D

  1. Identify each compound and its characteristic colour

    We match the compounds in List I with well-known colours from qualitative inorganic chemistry.

    A. Fe4[Fe(CN)6]3⋅xH2O\mathrm{Fe}_4[\mathrm{Fe}(\mathrm{CN})_6]_3\cdot x\mathrm{H_2O}Fe4​[Fe(CN)6​]3​⋅xH2​O

    This is Prussian blue.

    So, A→III (Prussian Blue)A \to \text{III (Prussian Blue)}A→III (Prussian Blue)

    B. [Fe(CN)5NOS]4−[\mathrm{Fe}(\mathrm{CN})_5\mathrm{NOS}]^{4-}[Fe(CN)5​NOS]4−

    This is related to nitroprusside type complex, which gives a violet colour.

    So, B→I (Violet)B \to \text{I (Violet)}B→I (Violet)

    C. [Fe(SCN)]2+[\mathrm{Fe}(\mathrm{SCN})]^{2+}[Fe(SCN)]2+

    Ferric ion with thiocyanate gives the characteristic blood red complex.

    So, C→II (Blood Red)C \to \text{II (Blood Red)}C→II (Blood Red)

    D. (NH4)3PO4⋅12MoO3(\mathrm{NH}_4)_3\mathrm{PO}_4\cdot 12\mathrm{MoO}_3(NH4​)3​PO4​⋅12MoO3​

    This is ammonium phosphomolybdate, which is yellow.

    So, D→IV (Yellow)D \to \text{IV (Yellow)}D→IV (Yellow)

  2. Final matching

    A→III,B→I,C→II,D→IVA\to III,\quad B\to I,\quad C\to II,\quad D\to IVA→III,B→I,C→II,D→IV

  3. Compare with options

    This corresponds to Option D.

  4. Comparison with stored correct answer

    Stored correct answer = D

    Our derived answer = D

    Hence, they agree.

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