Question

arrange in increasing order of their incresing boiling point Ortho nitrophenol meta nitrophenol and para nitrophenol​

Answer 1

i)The increasing order of their incresing boiling point Ortho nitrophenol meta nitrophenol and para nitrophenol​ are in the order ortho nitrophenol, meta nitrophenol, and para-nitrophenol   increase in that order.

ii)The melting points of the nitro-phenols reflect the degree of intermolecular hydrogen bonding .

iii) For  ortho -nitrophenol, hydrogen bonding would be intra-molecular, i.e. confined to the SAME molecule. For  meta  and  para nitrophenols  , hydrogen bonding would become intermolecular, a force between molecules. This is reflected by the higher melting points and boiling points. This is the reason of the given increasing order.