MCQ
Which of the following metal does not replace hydrogen?
- AZn
- BFe
- ✓Cu
- DMg
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| Column I | Column II |
| $(a)$ For electrolyte $CaSO_4$ | $(i) i = 5$ |
| $(b)$ For ideal Solution | $(ii) i = 2$ |
| $(c)$ For electrolyte $Al_2(SO_4)_3$ | $(iii) i = 4$ |
| $(d)$ For electrolyte $Na_3PO_4$ | $(iv) i = 1$ |

| Column I | Column II |
| (a) Solution of gas in gas | (i) Brass |
| (b) Solution of solid in solid | (ii) Air |
| (c) Solution of liquid in gas | (iii) Zinc amalgam |
| (d) Solution of liquid in solid | (iv) Chloroform in Nitrogen |