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a.(A) + KBr rarryellow ppt . (B) (A) + "conc". H_(2)SO_(4) overset(Delta) to brown vapours intensifield with cu- turnings. (B) dissolves in lypo forming a soluble complex (C ) what are (A),(B) and (C ) and explain their reactions ? b. SO_(3)^(2-) and SO_(4)^(2-) both give while ppt with BaCI_(2) solution .How is SO_(3)^(2-) detected in presence of SO_(4)^(2-)? c. Na_(2)B_(4)O_(7).10 H_(2)O +"conc".H_(2)SO_(4) overset(Delta) to (A) overset(CH_(2)OH Delta) to (B) idenity (A) and (B) d. (A) + dii H_(2)SO_(4) overset(Delta) to gas (B) Gas (B)turns K_(2)Cr_(2)O_(7) //H^(Theta) solutiongreen Aq solution of (A) + BaCI_(2) rarrwhile ppt .(C ) Filltrate after removing (C) + Br_(2) waterrarr while ppt dissolve in qammon ium acetate solution Example. |
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Answer» Solution :(A) `AgNO_(3) (B) AGBR (C ) Na_(2)[Ag(S_(2)O_(3))_(2)]` b. `BaSO_(4)` is insoluble in cone `HCI` while `BaSO_(3)` remainsoluble Soparate `HaSO_(4)` and add `Hr_(2)` WATER into filrate `So_(3)^(2-)` is axidised to `SO_(4)^(2-)` and given white ppt of `BaSO_(4)` `Br_(2) + H_(2)O rarr 2HBr + O` `BaSO_(3) + O rarr BaSO_(4) darr` c. (A) `H_(2)BO_(3)` (B) `(CH_(3)O)_(3)B` burns with green edges flame d. (A) `SO_(3)^(2-) + SO_(4)^(2-)`(B) :`SO_(2)` (C ) `BaSO_(4)` e. `2CH_(3)COONH_(4) + UNDERSET("White ppt".)(PbSO_(4) rarr) underset("Soluble")((CH_(3)COO)_(2)) Pb + (NH_(4))_(2)SO_(4)` |
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