Explain why is sodium less reactive than potassium. from Chemis
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    The s-Block Elements

    Multiple Choice QuestionsShort Answer Type

    11.

    Why alkali metals do not form M2+ ions?

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    12.

    Name the radio active element in group 1. How does it resemble with the remaining elements of the group?

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    13.

    Why alkali metals are normally kept in kerosene oil?

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    14.

    Why lithium cannot be stored in kerosene?

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    15.

    Why does lithium form complexes?

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    16.

    Why are alkali metal ions diamagnetic and colourless?

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    17.

    Why are alkali metals the most electropositive in nature?

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    18.

    Find out the oxidation state of sodium in Na2O2. 

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    19. Explain why is sodium less reactive than potassium.

    Sodium is less reactive than potassium because ionisation enthalpy (∆H) of sodium (520 kJ mol–1) is more than that of potassium (496 kJ mot–1). Therefore it will lose electrons less readily as compared to potassium. 
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    20.

    What happens when Magnesium is burnt in the air ?

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