A) \[FeC{{l}_{3}}\]
B) \[NaCN\]
C) \[NaOH\]
D) \[NaCl\]
Correct Answer: A
Solution :
\[FeC{{l}_{3}}\]is a salt of strong acid and weak base, hence on hydrolysis, it gives acidic solution. Hence, the pH value of solution will be less than 7.
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