An oragne colour solid (A) on heating gives a colourless gas (B) and colourless vapours (C) which on condensatio gives a colourless neutral liquid and a green residuce (D) which is a metal oxide. Gas - B gives a pungent odoured gas when reacts with hydrogen catalytically. Neutral liquid above formed converts anhydrous copper sulphate to blue Compound 'A' in the above paragraph is .......

An oragne colour solid (A) on heating gives a colourless gas (B) and c

1.	An oragne colour solid (A) on heating gives a colourless gas (B) and colourless vapours (C) which on condensatio gives a colourless neutral liquid and a green residuce (D) which is a metal oxide. Gas - B gives a pungent odoured gas when reacts with hydrogen catalytically. Neutral liquid above formed converts anhydrous copper sulphate to blue Compound 'A' in the above paragraph is .......
Answer» `K_2Cr_(2)O_7` `NH_(4)Cl` `(NH_4)_(2)Cr_(2)O_7` `K_(2)CrO_4` Solution :`underset("orange")Aoverset(Delta)rarrunderset((a))(B+C)("VAPOUR")overset("Condensation")rarr"Liquid"+underset("green")D` `underset((A))underset("Orange")((NH_4)_2)Cr_2O_7overset(Delta)rarrunderset((B))underset((a))(N_2)+underset((C))underset((a))(4H_(2)O)+Cr_(2)O_(3)rarrunderset("Liquid")underset("Neutral")underset(uarr)(N_(2_((g))))+H_(2)O_((l))+underset((D))underset("green")(Cr_(2)O_3)` SINCE Gas B - on reaacts with Hydrogen give pungent odoured gas i.e. `NH_(3)` the staring material .A. Should contain NITROGEN . So A - is `(NH_4)_(2)Cr_(2)O_7`