Questions
Which one of the following complex gives positive brown ring test
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By Expert Faculty of Sri Chaitanya
a
CoNH35BrNO3
b
CoNH35NO3Br
c
CoNH35BrI
d
CoNH35IBr
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Correct option is A
Brown ring test is used to confirm the presence of nitrate ion in the solution. To a solution of nitrate salt freshly prepared FeSO4 is added and then conc. H2SO4 is slowly added through the walls of test tube by keeping the test tube inclined. A brown ring formed at the junction of two solutions indicate the presence of NO3- ion in the solution.Formula of brown ring is [Fe(H2O)5NO]+2 .Similar Questions
According to werner primary valency of central atom in Complex is
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