Which of the following is not the correct formula?

H_{2} S

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N a H S O_{4}

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S i O_{2}

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N a S i O_{3}

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Solution

The correct option is D $N a S i O_{3}$
The correct formula is $N a_{2} S i O_{3}$ .
$S i$ is in $+ 4$ oxidation state, whereas $N a$ and $O$ are in $+ 1$ and $- 2$ oxidation states respectively.

Hence, $2$ $N a$ atoms are required.

$N a S i O_{3}$ is not correct formula.

Therefore, option D is correct.

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