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Question

An oxide of lead changes to another insoluble oxide and soluble salt on reaction with HNO3
(a) What is Oxide ?.
(b) What is insoluble oxide ?.
(c) What is soluble salt ?.

A
(a)Pb3O4; (b)PbO3; (c)Pb(NO3)2
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B
(a)Pb3O3; (b)PbO2; (c)Pb(NO3)3
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C
(a)Pb3O4; (b)PbO2; (c)Pb(NO3)2
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D
(a)Pb3O4; (b)PbO4; (c)Pb(NO3)3
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Solution

The correct option is D (a)Pb3O4; (b)PbO2; (c)Pb(NO3)2
Given that an oxide of lead changes to another insoluble oxide and soluble salt on reaction with HNO3.
The reaction is as follows:
Pb3O4+HNO3Pb(NO3)2+PbO2+H2O
The lead oxide (a) is Pb3O4 which is non-polar and insoluble in water, changes to another insoluble oxide (b) PbO2 and soluble salt (c)Pb(NO3)2 on reaction with HNO3.

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