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(a) (AlCl₃, LiCl & BeCl₂) all these solutions are acidic due to cationic hydrolysis, whereas BaCl₂ is salt of strong base (Ba(OH)₂) and strong acid (HCl), hence it will have maximum pH.

1. AlCl₃
2. LiCl
3. BeCl₂
4. BaCl₂

Correct answer: BaCl₂

Solution

BaCl₂ is a neutral salt formed from a strong acid (HCl) and a strong base (Ba(OH)₂), so it does not undergo hydrolysis and has the highest pH among the given options.

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