Sol nh4cl nh4oh (nh4)2co3 dissolve the white . In acetic acid or take salt solutin and add ammounium oxlatate.
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Why is concentrated sulphuric acid or concentrated nitric acid not used in a flame test? Conc. H2SO4 and HNO3 is not used because the sulphate and nitrate salts are less volatile and even decompose on the flame giving oxide which less ionisable.
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