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Qualitative analysis

Which of the following is test for Borate?


Take turmeric paper in a solution of salt in dill HCl and moister this paper with NaOH, then reddish Brown color changing to Bluish black or Greenish black which confirms borate ion BO33−

b) Silver mirror test is for distinguish aldehydes
c) Brown ring test is for nitrate ion
d) Lead acetate test is for sulphide ion.

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