Q.

A red coloured mixed oxide(X) on treatment with con.HNO3 gives a compound (Y). (Y) with HCl produces a chloride (Z) which is insoluble in cold water but soluble in hot water. (Z) can also be formed by treating (X) with conc. HCl . Compounds(X), (Y) and (Z) are

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a

Pb3O4,PbO2,PbCl2

b

Mn3O4,MnO2,MnCl2

c

Fe3O4,Fe2O3,FeCl3

d

Fe3O4,FeO,FeCl2

answer is `.

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Detailed Solution

Pb3O4(X) is red coloured mixed of oxide consisting PbO and PbO2Pb3O4+4HNO3→ 2PbNO32+PbO2(Y)+2H2OPbO2(Y)+4HCl→ PbCl2+2H2O+Cl2PbCl2 is insoluble in cold water but soluble in hot water Pb3O4(X)+8HCl→ 3PbCl2+4H2O+Cl2
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A red coloured mixed oxide(X) on treatment with con.HNO3 gives a compound (Y). (Y) with HCl produces a chloride (Z) which is insoluble in cold water but soluble in hot water. (Z) can also be formed by treating (X) with conc. HCl . Compounds(X), (Y) and (Z) are