1.

Give balanced chemical reactions for the following: i. Sodium iodate is treated with sodium bisulphite solution. ii. Chlorine is passsed through hot NaOH solution. iii. Chlorine is passed through aqueous potassium hydroxide. iv. Chlorine gas is bubbled through a solution of ferrous bromide. v. Iodine reacts with conc. `HNO_(3)`. vi. Chlorine is passed over slaked lime. vii. Sodium chloride is heated with `K_(2)Cr_(2)O_(7)` and conc. `H_(2)SO_(4)`. viii. Potassium iodide is heated with `MnO_(2)` and conc. `H_(2)SO_(4)`. ix. Chlorine reacts with `Na_(2)SO_(3)` solution. x. Iodine is added to stannous chloride solution. xi. Chlorine is passe through a suspension of idine. xii. `CI_(2)` is passed through a suspension of `CaCO_(3)`. xiii. Chlorine gas is passed through dry and aqueous sulphur dioxide. xiv. Bromine reacts with `Na_(2)CO_(3)` solution. xv. Potassium reacts is added to bleaching powder containing dilute acetic acid.

Answer» (i) `2NaIO_(3)+5NaHSO_(3) rarr 3NaHSO_(4)+2Na_(2)SO_(4)+H_(2)O+I_(2)`
(ii) `3Cl-(2)+6NaOH(conc.) overset(Hot)(rarr) 5NaCl+NaClO_(3)+3H_(2)O`
(iii) `Cl_(2)+2KOH_((aq.)) rarr KCI+KOCl+H_(2)O`
(iv) `2FeBr_(2)+3Cl_(2) rarr 2FeCl_(3)+2Br_(3)`
(v) `I_(20) +10HNO_(3) rarr 2HIO_(3)+10NO_(2)+4H_(2)O`
(vi) `Ca(OH)_(2)+Cl_(2) rarr Ca(OCl)Cl+H_(2)O`
(vii) `4NaCl+K_(2)Cr_(2)O_(7)+6H_(2)SO_(4) rarr 2CrO_(2)Cl_(2)+4NaHSO_(4)+2KHSO_(4)+3H_(2)O`
(viii) `2KI+MnO_(2)+3H_(2)SO_(4) rarr 2KHSO_(4)+MnSO_(4)+2H_(2)O+I_(2)`
(ix) `Cl_(2)+Na_(2)SO_(3)+H_(2)O rarr 2HCl+Na_(2)SO_(4)`
(x) `SnCl_(2)+2HCl=I_(2) rarr SnCl_(4)+2HI`
(xi) `I_(2)+5Cl_(2)+6H_(2)O rarr 2HIO_(3)+10HCl`
(Xii) `2CaCO_(3)+2Cl_(2) rarr CaCl_(2)+Ca(ClO)_(2)+2CO_(2)`
(xiii) `ubrace(SO_(2)+Cl_(2))_("Dry") rarr SO_(2)Cl_(2)`
`SO_(2)+Cl_(2)+2H_(2)O rarr H_(2)SO_(4)+2HCl`
(xiv) `3Br_(2)+underset(("conc. and hot"))(2Na_(2)CO_(3)) rarr 5NaBr+NaBrO_(3)+3CO_(2)`
(xv) `CaOCl_(2)+2CH_(3)COOH+2KI rarr (CH_(3)COO)_(2)Ca+2KCl+I_(2)+H_(2)O` .


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