Remember one thing u will always not have the table with u, so there is another simpler method of finding the pH strenth
We all know that HCl is a strong acid thus its pH will be lowest among all the given compounds and KOH is a strong base whose pH will be highest among all .
So to write the given components in order of increasing pH
HCl ----------------------------KOH
Now we have to fix the other compounds in between these two.
Lets take KCl , cation K+ is the conjugate acid of strong base KOH will not affect the pH of the solution and Cl- anion is the conjugate base of strong acid HCl will also not affect the pH of the solution, thus the combined effect is pH neutral.
About KF , cation is the conjugate acid of strong base KOH will not affect the pH and F-is the conjugate base of weak will cause an increase in pH thus the combined effect is a basic solution.
For ZnCl2, anion Cl- is the conjugate base of strong acod HCl will not affect the pH but the cation Zn2+ is the conjuate acid of a weak base will cause decrease in pH which means the combined effect is an acidic solution.
Now we arrange them all in the order of increasing pH means from lower pH to higher
HCl< ZnCl2 < KCl< KF<KOH
Hope this helps!