Which one of the following compound contains both ionic and covalent bond?

S i O_{2}

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B a F_{2}

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N a_{2} C O_{3}

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C l_{2} O

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Solution

The correct option is C $N a_{2} C O_{3}$
${B a F}_{2}$ is an ionic compound as there is huge difference in the electronegativities of $B a$ and $F$ .
${S i O}_{2}$ and ${C l}_{2} O$ are covalent compounds.
${N a}_{2} {C O}_{3}$ contains both ionic and covalent bonds. It contains ${N a}^{+}$ and ${C O}_{3}^{2 -}$ ions. Also, the bonds in ${C O}_{3}^{2 -}$ are covalent.

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