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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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Verified by Experts

`S_(1)` : Due to strong interatomic forces
`S_(2)` : Some of the hydrochloric acid is oxidised to chlorine and thus we get less volume of `KMnO_(4)` than the actual one.
`S_(3) : MnO_(4^(-)) + e^(-) overset(OH^(-))rarr MnO_(4^(2-))`
Therefore, (A) option is correct.
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KMnO_(4) is a strong oxidising agent in acidic medium. To provide acidic medium H_(2)SO_(4) is used instead of HCl. This is because

A : In alkaline medium, KMnO_(4) acts as powerful oxidising agent. R : KMnO_(4) reduces to give Mn^(2+) in alkaline medium.

Statement-1: Equivalent mass of KMnO_(4) is equal to one-third of its molecular mass when it acts as an oxidising agent in an alkaline medium. Statement-2: Oxidation number of Mn is +7 in KMnO_(4) .

STATEMENT-1: Equivalent mass of KMnO_(4) in different mediums are different STATEMENT-2 KMnO_(4) can act as a oxidising agent .

Explain by giving equation for the reaction : (i) Mn^(3+) disproportionates to Mn^(2+) and MnO_(2) in acidic medium. (ii) KMnO_(4) heated with KOH

Determine the equivalent weight of the following oxidising and reducing agents : (a) KMnO_(4) (reacting in acidic medium MnO_(4)^(-)rarrMn^(2+) ) (b) KMnO_(4) (reacting in neutral medium MnO_(4)^(-)rarr MnO_(2) )

Number of electrons transferred in each case when KMnO_(4) acts as an oxidising agent to give MnO_(2),Mn^(2), Mn(OH)_(3) and MnO_(4)^(2-) are respectively:

NARAYNA-D BLOCK & TRANSITION ELEMENTS-Level-VI (H.W)
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