Which of the following is a $Br\text{ø}nsted-Lowry$ acid?

Identify a weak electrolyte from the following based on their dissociation nature in an aqueous medium.

Which activity from the following is exhibited by a $Lewis$ base according to its definition?

Which of the following is the strongest Bronsted base?

Observe the following species: $AlCl_3, NH_3, H^{+}, Co^{3+}, OH^{-}, H^{-}, Mg^{2+}, BF_3, Cl^{-}$. How many Lewis bases are present in the above list?

Which of the following cannot act as a Lewis or Bronsted acid?