In given following phenol and its derivaties only para-methyl phenol does not produce any colour with phthalic anhydride in the presence of conc. H2SO4.
<p>In given following phenol and its derivaties only para-methyl phenol does not produce any colour with phthalic anhydride in the presence of conc. H<sub>2</sub>SO<sub>4</sub>.</p>
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