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S(1)interstitial compound have high melt...

`S_(1)`interstitial compound have high melting points, higher than those of pure metals.
`S_(2)` Permanganate titration in presence of hydrochloric acid are unsatisfactory
`S_(3)`: `KmnO_(4)` does not act as an oxidising agent in strong alkaline medium.
`S_(4):KMnO_(4)` On heating in a current of `H_(2)` gives `MnO`

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