Q. 2

Alkali metals rea

Answer :

Alkali metals react with water and form hydroxides and dihydrogen.

2M + 2H2O 2M+ + 2OH- + H2 where M is an alkali metal. Lithium has the most negative EӨ value, however it has the least vigorous reaction with water. It is even less vigorous than sodium, which has the least negative EӨ value. This is because of the small size of Li and its high hydration energy. It is also because Li has the highest melting point. The correct answer is (i).

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