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Question

Which of the following arder is correct for the reactivity of metals?
  1. Mg > Na > Fe > Au
  2. Mg > Fe > Na > Au
  3. Na > Mg > Fe > Au
  4. Na > Au > Fe > Mg


Solution

The correct option is C Na > Mg > Fe > Au
Sodium (Na) is the most reactive element amongst the other three because sodium reacts violently even with the cold water.

Magnesium (Mg) on the otherhand reacts to a very little extent to the warm water.

Red hot iron (Fe) reacts with steam at high temperature.

And lastly, gold (Au) is a noble metal, it barely reacts with the steam also.

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