Which statement below is incorrect regarding balanced equations?

C + O_{2} \to C O_{2}

is balanced and is a synthesis reaction

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C a C O_{3} \to C a O + C O_{2}

is balanced and is a decomposition reaction

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N a + C l_{2} \to N a C l

is not balanced but demonstrates a synthesis reaction

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K I + P b (N O_{3})_{2} \to P b I_{2} + K N O_{3}

is balanced and is a single replacement reaction

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2 H_{2} O \to 2 H_{2} + O_{2}

is balanced and demonstrates a redox reaction

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Solution

The correct option is E $K I + P b (N O_{3})_{2} \to P b I_{2} + K N O_{3}$ is balanced and is a single replacement reaction
$K I + P b (N O_{3})_{2} \to P b I_{2} + K N O_{3}$ is not a balanced reaction as $I$ and $N O_{3}$ both are not balanced in reactant and product side.

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