Identify the correct balanced chemical equation from the following.

S O_{3} + 2 H_{2} O \to H_{2} S O_{4}

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6 N a O H + 12 S \to 2 N a_{2} S_{5} + N a_{2} S_{2} O_{3} + 3 H_{2} O

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C u + 2 S \to C u S_{2}

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S + 4 H N O_{3} \to H_{2} S O_{4} + 4 N O_{2} + 2 H_{2} O

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Solution

The correct option is D $6 N a O H + 12 S \to 2 N a_{2} S_{5} + N a_{2} S_{2} O_{3} + 3 H_{2} O$
If we make a balance of atoms on either side of the equation, only second equation has equal number of atoms on both side of the equation so it is the only correct balanced chemical eqution.

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