A metal salt evolves the dark violet fumes of (X) with `MnO_(2)` and this (X) gives the deep blue colouration with starch soluti

A metal salt evolves the dark violet fumes of (X) with `MnO_(2)` and this (X) gives the deep blue colouration with starch solution. Then number of lone pair on central atom in (X).

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A metal salt evolves the dark violet fumes of (X) with `MnO_(2)` and this (X) gives the deep blue colouration with starch solution. Then number of lon

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