Neutralization of an acid with a base invariably results in the production of

Which of the following is a Lewis acid?

What will be the $pH$ of the solution if $BCl_3$ is dissolved in water?

The correct order of basic strength of the following compounds is:
$(I)$ $KOH$
$(II)$ $Zn(OH)_2$
$(III)$ $HNO_3$
$(IV)$ $Ca(OH)_2$

The compound $HCl$ behaves as $...$ in the reaction,$HCl + HF \to H_2Cl^{+} + F^{-}$

Which of the following species are only Lewis acids but not Bronsted acids from $CO_{2}$,$BCl_{3}$,$NH_{3}$,$CH_{3}NH_{2}$,$NO_{2}^{+}$,and $C_{6}H_{5}NH_{3}^{+}$?