Which of the following will have $p H$ value greater than $7$ ?

N a C l

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K I

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M g C l_{2}

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L i F

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Solution

The correct option is B $L i F$
A salt of strong acid and weak base has a $p H$ less than $7$ while a salt of weak acid and strong base has a $p H$ greater than $7.$ So $L i F$ is a salt of weak acid and strong base so it has $p H$ greater than $7.$

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