11th Class Chemistry The s-Block Elements / s-ब्लॉक के तत्व Question Bank 11th CBSE Chemistry Alkali Metals

  • question_answer
    Lithium has highest ionization enthalpy in group \[I\]elements, yet it is the strongest reducing agent. Why?

    Answer:

                    In aqueous solutions, the tendency of an element to lose electrons does not entirely depend upon its ionization enthalpy. It also depends upon its enthalpy of sublimation and the enthalpy of hydration of the ion left after the loss of an electron. The combined effect of these factors is measured in terms of electrode potential. Since lithium has the most negative electrode potential of group \[I\]elements, therefore, lithium is the strongest reducing agent.


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