`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 bu

`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.
A. FTTT
B. TFTT
C. FFTT
D. TTTF

`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 w

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