11th Class Chemistry The s-Block Elements

  • question_answer 39)   Alkali metals react with water vigorously to form hydroxides and dihydrogen. Which of the following alkali metals reacts with water least vigorously? (a) Li                     (b) Na                                   (c) K                      (d) Cs

    Answer:

      (a) Lithium is least reactive amongst alkali metals and it reacts with water least vigorously as it has the highest ionisation enthalpy amongst alkali metals.

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