Areaction between which two reactants will consistently yield a salt that forms an acidic solution?

A reaction between a strong acid and a weak base.

Explanation:

The conjugate acid of a weak base is a strong acid.

The reaction above is reversible, so we can write

Thus, the solution of the salt will be acidic, because it produces hydronium ions.

Example;

Ammonium chloride is the salt of a strong acid (HCl) and a weak base (NH₃).

Solutions of NH₄Cl are acidic.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current