1.

K_(2)Cr_(2)O_(7) + "conc" H_(2)SO_(4)+ H_(2)O_(2) etherrarrblue precipitate anbydride (in enthereal layer) Blue colour is due to

Answer»

`CrO_(3)`
`H_(2)CrO_(4)`
`H_(2)Cr_(2)O_(3)`
`CrO_(3)`

ANSWER :d


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