Question

When element M of IA group reacts with water, it gives:(a) MOH+O₂ (b) MOH+H₂O (c) MOH+H₂ (d) MH+H₂

Answer 1

c)MOH+H2

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Answer 2

When element M of IA group reacts with water, it gives (c) MOH + H₂

Explanation:

• 1ᵃ refers to the first group in periodic table.
• This group comprises alkali metal which includes lithium, sodium, potassium, rubidium, francium and caesium.
• The only gas element in this group is hydrogen.
• When alkali metals react with water they produce hydroxide of respective metal and liberate hydrogen gas.
• The outermost orbital of all the element is s-orbital.
• $\bold{2M+2H_2O\longrightarrow 2MOH+H_2}$