Railways Sample Paper RRB (Group D) Sample Test Paper-12

  • question_answer
    What is the formula of potassium ion in the noble gas state?

    A)  \[{{K}^{+}}\]            

    B)  \[{{K}^{2+}}\]

    C)  \[{{K}^{2-\,}}\]                      

    D)  \[{{K}^{-}}\]

    Correct Answer: A


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