alleryArrange the following metals in decreasing order of reactivity as verified in your syllabus reactivity series
AFe > Zn > Al > Mg > Ca > Na > K
BK > Na > Ca > Mg > Al > Zn > Fe
CK > Ca > Na > Fe > Mg > Al > Zn
DAl > Zn > Fe > K > Na > Mg > Ca
Answer & Solution
Correct answer: B. K > Na > Ca > Mg > Al > Zn > Fe
1. Your syllabus gives the reactivity series in decreasing order.
2. Top of series (most reactive): K > Na > Ca > Mg > Al.
3. Middle: Zn > Fe > Pb > (H).
4. Least reactive: Cu > Hg > Ag > Au. So the correct order is K > Na > Ca > Mg > Al > Zn > Fe.
_Source: syllabus Science, Ch 3 "Metals and Non-metals", §3.2.5 Table 3.2_
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