1.

(a) K_(2)Cr_(2)O_(7)is treated with SnCL_(2), in acidic media. (b) Pb_(3)O_(4) is trerated with conc. HNO_(3) (c) Pb(CH_(3)COO)_(2) is treated with bleaching powder. (d) PbO_(2), is treated with NaOH (e) Ferrous sulphate is ignited (F) FeCl_(3) is treated with sodium carbonate. The resulting precipitate is further heated.

Answer»

Solution :(a) ` K_(2)Cr_(2)O_(7) + 14HCl + 3SnCl_(2) rarr 3SnCl_(4) + 2KCl + 2CrCl_(3) + 7H_(2)O`
(b) ` Pb_(3)O_(4) + 4HNO_(3) rarr 2PB(NO_(3))_(2) + PbO_(2) + H_(2)O`
(c ) `Pb(CH_(3)COO)_(2) + Ca(OCL)Cl + H_(2)O rarr PbO_(2) + CaCl_(2) + 2CH_(3)COOH`
(d) ` PbO_(2) + 2NaOH rarr Na_(2)PbO_(3) + H_(2)O`
(e) `2FeS_(4) rarr Fe_(2)O_(3) + SO_(2) + SO_(3)`
(f) `2FeCl_(3) + 2Na_(2)CO_(3) + 3H_(2)O rarr 2Fe(OH)_(3) 6NaCl + 3CO_(2)`
`2Fe(OH)_(3) rarr Fe_(2)O_(3) + 3H_(2)O`


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