1.

Which of the following statement(s) is(are) incorrect ?

Answer»

In thioure test for nitric ,a green coloured SOLUTIONIS obtained
it is notnecessary tocarryoutthe chromyl CHLORIDE testin a drytest tube
In `PbNO_(3)` the brownring test can be performed with its WATER extract
Suspension of `CdCO_(4)` gives BLACK ppt , with sodium sulphide solution

Solution :It is deep red colouration due to the formationof `Fe(SCN)_(3)`
b. In presence of moisture following reaction will occure `CrCO_(2)CI_(2) + H_(2)O rarr H_(2)CrO_(4) + CHI`
So test is carried outonly in dry test tube
c. White precipitate of `PBSO4` is formed and hence brown ring in hot visible
d, Gives yellowprwecipitate of `CdS`


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