1.

A student was given a sample of colourless solution containing three cations and was asked to identify the cations.Student carried out a series of reactions as given below. Which of the following statements is correct ?

Answer»

Precipitate 'C' gives Rinmann's green test
Precipitate 'B' is appreciably soluble in boling CONCENTRATED `H_2SO_4`
Precipitate (A) on exposure to sunlight or ultraviolet radiations turns BLACK
All of these

Solution :(A)`COO. ZnO`=Rinmann's green reagent used as green pigment
(B)`BaSO_4 darr + H_2SO_4` (CONC.) `to Ba^(2+)+HSO_4^(-)`
(C )`2AgCl darr`(WHITE ) `overset(hv)to 2Ag darr` (black) +`Cl_2 uarr`


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