Q: Which one of the following contains all Lewis acids?
(a)AlCl3, Co3+, BF3
(b)BCl3, NH3, OH⁻
(c)Mg2+, H2O, F⁻
(d)BF3, NH3, H2O
Correct Answer: (a)
The correct answer is (c) 'Mg2+, H2O, F⁻'. This question from the General Studies domain tests knowledge of Miscellaneous.