Which of the following is an incorrect formula?

N a C l_{2}

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B a S O_{4}

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H_{2} C O_{3}

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P_{2} O_{5}

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Solution

The correct option is B $N a C l_{2}$
The valency of Na is $+ 1$ and Cl is $- 1$ . So on cross multiplying the valencies we get NaCl.
Therefore, the correct option is $A$ .

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