1.

A well known orange crystalline compound A when burnt imparts violet colour to flame. When heated with compound B in presence of concentrated sulphuric acid then it evolves a red coloured gas C which when passed through alkaline solution of lead acetate gives yellow precipitate of compound D. Identify D.

Answer»

`CrO_2 Cl_2`
`K_2 Cr_2 O_7`
`As_2 S_3`
`PbCr O_4`

SOLUTION :`A = K_(2) Cr_(2) O_(7) , B = NH_(4) Cl , C = CR O_(2) Cl_(2) , D = Pb CrO_(4) , E = NH_(3)`


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