Salicylaldehyde is synthesized from phenol when reacted with:

Explain why $ortho$-nitrophenol is more acidic than $ortho$-methoxyphenol?

The correct order of boiling points of the below compounds is:
$(I)$ Methoxybenzene
$(II)$ $m$-Cresol
$(III)$ $o$-Cresol

Arrange the following compounds in increasing order of their acid strength: $Propan-1-ol$,$2,4,6-trinitrophenol$,$3-nitrophenol$,$3,5-dinitrophenol$,$phenol$,$4-methylphenol$.

Which of the following compounds has the least $pK_a$ value?

What is the $IUPAC$ name of picric acid?