MCQ
Find the odd one out :
- A$K _3\left[ Fe ( CN )_6\right]$
- ✓$\left[ Cu \left( NH _3\right)_4\right] SO _4$
- C$\left[ Cr \left( H _2 O \right)\right] Cl _3$
- D$\left[ CO \left( NH _3\right)_4 Cl _2\right] Cl$
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| Column – I | Column – II |
| A. Cyanide process | (i) Ultrapure Ge |
| B. Froth floatation process | (ii) Dressing of ZnS |
| C. Electrolytic reduction | (iii) Extraction of Al |
| D. Zone refining | (iv) Extraction of Au |
| (v) Purification of Ni |