a.(A) `+ KBr rarr ` yellow 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)` solution green Aq solution of (A) `+ BaCI_(2) rarr ` while ppt .(C )
Filltrate after removing (C) `+ Br_(2)` water rarr while ppt` dissolve in qammon ium acetate solution Example.

Explanation

(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)` remain soluble 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)`