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Na(2)S(2)O(3) may react with the compoun...

`Na_(2)S_(2)O_(3)` may react with the compound given in Column-I, `Na_(2)S_(2)O_(3)` exhibits the properties of the type give in the coloumn-II, matter the reactants given in column-I with the type of property, properties given in Column-II
`{:("COLUMN-I","COLUMN-II"),((A)SO_(2),(p)"turns acidified "K_(2)Cr_(2)O_(7)" solution green"),((B)CO_(2),(q)"turns blue is Red"),((C )H_(2)S,(r )"turns lime water milky"),((D)H_(2)O_(2),(s) "used for restoring old paintings in the museums"):}`

Text Solution

Verified by Experts

A) `K_(2)Cr_(2)O_(7)+3SO_(2)+H_(2)SO_(4) to K_(2)SO_(4)+underset("Green")(Cr_(2)(SO_(4))_(3))+H_(2)O`
`Ca(OH)_(2)+SO_(2) to underset("milky")(CaSO_(3))+H_(2)O`
In aqueous solution it acts as an acid turns moist litmus red.
B) `H_(2)O+CO_(2) to underset("Turns blue to red")underset("Carbonic acid")(H_(2)CO_(3)) Ca(OH)_(2)+CO_(2) to underset("Milky white ppt")(CaCO_(3)darr) `
C) `K_(2)Cr_(2)O_(7)+4H_(2)SO_(4)+3H_(2)S to K_(2)SO_(4)+Cr_(2)(SO_(4))_(3)+7H_(2)O+3S`
Aqeuous solution `H_(2)S` acidic because it is a weak dibasic acid.
`H_(2)S+H_(2)O to H_(3)O^(+)+S^(2-)`
D) The equation used for restoring of old oil painting in the museums.
`PbS+4H_(2)O_(2) to PbSO_(4)+4O_(2)`
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