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Auto Protolysis of Water

Which one of ...

Question

Which one of the following has the highest $p H$ ?

Distilled water

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1 M - N H_{4} O H

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1 M - N a O H

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Water saturated with chlorine

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Solution

The correct option is C $1 M - N a O H$
Among the given solutions, NaOH is strongest base. Distilled water is almost neutral. $N H_{4} O H$ is a weak base and water saturated with chlorine is acidic. Therefore, NaOH has highest pH.

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