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The correct order of reactivity of the following metals is-
1. Na>Mg>Zn>Fe
2. Fe<Mg<Zn<Na
3. Mg>Na>Zn>Fe
4. None of these

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Correct Answer - Option 1 : Na>Mg>Zn>Fe

Explanation:

  • The reactivity of metal depends upon their ability to form a cation. So, metal has a more electropositive nature and also more reactivity.
  • In the periodic table, moving from left to right the reactivity of the element decreases, and moving from top to bottom reactivity increases.

Arranging the elements from the order of reactivity:

K>Na>Ca>Mg>Al>Zn>Fe>Pb>Cu>Ag>Au 

So, the correct order of reactivity is Na>Mg>Zn>Fe.

  • Caesium is the most reactive metal in the periodic table as well as the most electropositive element.

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