S_(1): 2Se_(2)Cl_(2)rarr SeCl_(4)+3Se S_(2) : Dioxides like MnO_(2), – InterviewSolution

1.	S_(1): 2Se_(2)Cl_(2)rarr SeCl_(4)+3Se S_(2) : Dioxides like MnO_(2), PbO_(2) do not form H_(2)O_(2) with dilute acids but they evolve oxygen with concentrated H_(2)SO_(4). S_(3) : Sodium thiosulphate with FeCl_(3) solution develops a pink or violet colour which soon vanishes. S_(4) : White precipitate of PbS_(2)O_(3) get soluble when boiled with water.
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