Square puzzle!

Which of the phenol derivatives above is the strongest acid? square Compound A square Compound B Square Compound C Square Compound D square Compound E Square Compound F

Which of the phenol derivaties above is the weakes acid square Compound A square Compound B Square Compound C Square Compound D square Compound E Square Compound F

"Monkey's puzzle" is a common name for

Determine the missing value in the puzzle below :

Consider the 3 -puzzle problem shown in figure.

Solve the following crossword puzzle with the help of the given clues :