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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 reactantsgiven in column-Iwith the type of property, propertiesgiven 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"):} |
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Answer» Solution :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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