JEE Main & Advanced JEE Main Paper (Held On 19 May 2012)

  • question_answer
    Which one of the following will react most vigorously with water?     JEE Main  Online Paper (Held On 19  May  2012)

    A) Li                                            

    B)                        K

    C)                        Rb         

    D)                        Na

    Correct Answer: C

    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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