The mismatched combinations are A. Chlorophyll - Co B. Water hardness - EDTA C. Photography - \(\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}\) D. Wilkinson catalyst - \(\left[\left(P h_{3} P\right)_{3} R h C l\right]\) E. Chelating ligand - D - Penicillamine Choose the correct answer from the options given below:

JEE Main · 2023 · 13 Apr 2023 · Shift 1 · Coordination Compounds

The mismatched combinations are
A. Chlorophyll - Co
B. Water hardness - EDTA
C. Photography -

[Ag (CN)_{2}]^{-}

D. Wilkinson catalyst -

[(P h_{3} P)_{3} R h C l]

E. Chelating ligand - D - Penicillamine

Choose the correct answer from the options given below:

(A)A and C Only✓ Correct
(B)A and E Only
(C)D and E Only
(D)A, C and E Only

Answer: (A)

Solution

The metal at the centre of chlorophyll is magnesium, not cobalt, so this pairing is mismatched. In black-and-white photography the undeveloped silver halide is dissolved as the dithiosulphato complex

[Ag (S_{2} O_{3})_{2}]^{3 -}

with hypo, whereas

[Ag (CN)_{2}]^{-}

belongs to the cyanide extraction of silver, so this pairing is also mismatched. Water hardness is estimated with EDTA, Wilkinson's catalyst is

[(P h_{3} P)_{3} RhCl]

, and D-penicillamine is a chelating ligand, all of which are correct. The mismatched combinations are A and C.

JEE Main · 2023 · 13 Apr 2023 · Shift 1 · Single correct option

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JEE Main · 2023 · 13 Apr 2023 · Shift 1 · Coordination Compounds

Solution

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