Which of the coordination compounds [(i) to (v)] are used for the following processes: A: Electroplating B: Removal of excess copper from human body C: Estimation of hardness of water (i) DMG (ii) Na ₂ EDTA (iii) Cis- platin (iv) D-penicillamine (v) K [ Au ( CN )₂ ]

Step-by-step solution

The coordination compound K [ Au ( CN )₂] (v) is used in the electroplating of gold. Therefore, A = v. D-penicillamine (iv) is a chelating agent used to treat Wilson's disease, which involves the removal of excess copper from the human body. Therefore, B = iv. Na ₂ EDTA (ii) is widely used in the estimation of hardness of water by forming stable complexes with calcium and magnesium ions. Therefore, C = ii. Comparing these findings with the given options, the correct mapping is A = v, B = iv, C = ii. Answer: A = v B