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JEE Main2012ChemistryClassification of Elements and Periodicity in PropertiesActual

Which one of the following will react most vigorously with water?

Options

  1. ALi
  2. BK
  3. CRb
  4. DNa

Correct answer

C. Rb

Step-by-step solution

Reactivity with water increases on moving down the Goup from Li to Cs as Li < Na < K < Rb < Cs . This is due to increase in electropositive character. Hence Rb reacts most vigorously with water.

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