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Pyrolusite ore on oxidation with KCIO(3)...

Pyrolusite ore on oxidation with `KCIO_(3)//KNO_(3)` in basic medium produces dark green coloured compound `(A)`, which on electrolysis produces a purple coloured compound `(B)`. The purple coloured rhombic prisms. It shows different reactions in different mediums.
Excess of compounds (B) on heating with conc. `H_(2)SO_(4)` gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen.
The nature of compound (C ) is `:`

A

basic

B

acidic

C

neutral

D

amphoteric

Text Solution

Verified by Experts

The correct Answer is:
B
Conceptual
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Pyrolusite ore on oxidation with KClO_(3) / KNO_(3) in basic medium produces dark green coloured compound "(A)," which on electrolysis produces a purple coloured compound (B).The purple coloured compound can be crystallised to deep purple rhombic prisms.It shows different reactions in different mediums.Excess of compound (B) on heating with conc. H_(2)SO_(4) gives an explosive oil (C),which on heating decomposes to gives another compound (D) along with oxygen.Identify (D)

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Knowledge Check

  • Pyrolusite ore on oxidation with KCIO_(3)//KNO_(3) in basic medium produces dark green coloured compound (A) , which on electrolysis produces a purple coloured compound (B) . The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. H_(2)SO_(4) gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. Identify (D).

    A
    `Mn_(2)O_(7)`
    B
    `MnO_(2)`
    C
    `MnSO_(4)`
    D
    `Mn_(2)O_(3)`

  • Pyrolusite ore on oxidation with KCIO_(3)//KNO_(3) in basic medium produces dark green coloured compound (A) , which on electrolysis produces a purple coloured compound (B) . The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. H_(2)SO_(4) gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. On passing CO_(2) in the solution of (A), a purple coloured solution along with brown ppt is observed.

    A
    disproportion reaction where oxidation no. changes from `+6` to `+7,+4`.
    B
    comproportionation reaction in where oxidation no. changes from `+3` to `+2`.
    C
    both (i) and (ii)
    D
    none

  • Pyrolusite ore on oxidation with KCIO_(3)//KNO_(3) in basic medium produces dark green coloured compound (A) , which on electrolysis produces a purple coloured compound (B) . The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. H_(2)SO_(4) gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. When (D) reacts with PbO_(2)//HNO_(3) it produces a purple // pink coloured compound (E). Identify (E)

    A
    `NaMnO_(4)`
    B
    `Mn(OH)_(2)`
    C
    `HMnO_(4)`
    D
    `Na_(2)MnO_(4)`

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    The aqueous solution of (C) on treatment with conc. H_(2)SO_(4) gives a orange coloured compound (E).

    Pyrolustie on heating with KOH in the presence of air gives dark green compound (A).The solution of (A) on treatment with H_(2)SO_(4) gives a purple coloured compound (B) which gives the following reactions : (i) Alkaline solution of B on reaction with KI changes it into compound (C ). (ii) The color of the compound (B) disappears on treatment with acidic soluiont of FeSO_(4) . (iii) On reaction with conc. H_(2)SO_(4) compound (B) gives another compound (D) which can decompose to produce compound (E ) along with oxygen gas. Identify compounds (A) to (E ) and write balanced chemical equation involved in each case.

    Pyrolusite ore on oxidation with KCIO_(3)//KNO_(3) in basic medium produces dark green coloured compound (A) , which on electrolysis produces a purple coloured compound (B) . The purple coloured rhombic prisms. It shows different reactions in different mediums. Excess of compounds (B) on heating with conc. H_(2)SO_(4) gives an explosive oil (C ), which on heating decomposes to gives another compound (D ) along with oxygen. Red coloured oxide (M) whose cation has pseudo inert electronic configuration reacts with compound (B) in acidic medium gives another oxide (N) which is black in colour. When sulphate of its metal is reacted with K_(4)[Fe(CN)_(6) it produces chocolate brown ppt. Select the correct statement.

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