Arrange the following metals in decreasing order of reactivity:

Question

Arrange the following metals in decreasing order of reactivity:

I. Gold

II. Calcium

III. Silver

IV. Cobalt

V. Magnesium

VI. Nickel

VII. Platinum

VIII. Lithium

1. A. I < II < III < IV < V < VI < VII < VIII
2. B. VIII < II < V < IV < VI < III < VII < I (Correct answer)
3. C. VIII < V < II < IV < VI < I < III < VII
4. D. VIII < VII < III < IV < VI < V < II < I

Correct Answer

Option B — VIII < II < V < IV < VI < III < VII < I

Detailed Solution & Explanation

The correct answer is VIII < II < V < IV < VI < III < VII < I.

Key Points

• Decreasing reactivity: Li(VIII) > Ca(II) > Mg(V) > Co(IV) > Ni(VI) > Ag(III) > Pt(VII) > Au(I).
• Reading most to least reactive: VIII, II, V, IV, VI, III, VII, I.