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Reactivity with Air CO2 and Water (Group 1)

The main oxid...

Question

The main oxides formed on combustion of $L i, N a$ and $K$ in excess of air are, respectively:

L i O_{2}, {N a}_{2} O_{2}

and

K_{2} O

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{L i}_{2} O_{2}, {N a}_{2} O_{2}

and

K O_{2}

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{L i}_{2} O, {N a}_{2} O_{2}

and

K O_{2}

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{L i}_{2} O, {N a}_{2} O

and

K O_{2}

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Solution

The correct option is C ${L i}_{2} O, {N a}_{2} O_{2}$ and $K O_{2}$
The main oxides formed on combustion of $L i, N a$ and $K$ in excess of air are, respectively ${L i}_{2} O, {N a}_{2} O_{2}$ and $K O_{2}$ .
Under ordinary conditions, lithium forms the monoxide, sodium forms the peroxide and other alkali metals form superoxide.
Hence, the correct option is $C$ .

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Similar questions

L i, N a

K

K + O_{2} ⟶ K O_{2}

K O_{3}, {N a}_{2} O_{2}

O - O

O_{2}, O_{2} (A s F_{6})

K O_{2}

K O_{2}

\to

K_{2} C O_{3}

O_{2}

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