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Question

Which is the correct order of rate of reactivity of metals to water?


  1. Na > K > Ca

  2. K = Na = Ca

  3. K < Na < Ca

  4. K > Na > Ca


Solution

The correct option is D

K > Na > Ca


Reactivity of metal decreases as we go down the activity/reactivity series of metals. In the reactivity series we see potassium to be placed above sodium followed by calcium. So potassium reacts more vigorously to water than sodium and sodium react more vigorously to water than calcium.

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