UPSC CDS I 2025 GK Paper

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Question : 59 of 120

Marks: +1, -0

Which one of the following contains all Lewis acids ?

AlCl₃, Co³⁺, BF₃
BCl₃, NH₃, OH^-
Mg²⁺, H₂O, F^-
BF₃, NH₃, H₂O

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