Consider the following salts. Which one(s) when dissolved in water will produce a acid solution?
$1. R b C l O_{4} 2. N a N O_{3} 3. N H_{4} C l 4. N a C l$

1

and

3

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only

3

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1

and

2

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3

and

4

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Solution

The correct option is B only $3$
Salt of strong acid and weak base produces acidic solution
So, ${N H}_{4} C l \Rightarrow ({N H}_{4} O H + H C l     )$
$S . A$
others are made from $(S . A + S . B)$ $\Rightarrow$ Neutral in $H_{2} O$
Thus, only $N H_{4} C l$ will produce acid solution.

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\begin{matrix} a . N H_{4} C l & b . K_{2} S O_{4} c . N a C N & d . K N O_{3} e . A l C l_{3} & f . C u S O_{4} g . K_{2} S O_{4} . A l_{2} (S O_{4})_{3} .24 H_{2} O & h . A l C l B r I i . Z n C l_{2} & j . N a H C O_{3} \end{matrix}

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