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Question

An oxide of lead changes to another insoluble oxide and soluble salt on reaction with $$HNO_3$$
(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)$$Pb_3O_4$$; (b)$$PbO_2$$; (c)$$Pb(NO_3)_2$$
Given that an oxide of lead changes to another insoluble oxide and soluble salt on reaction with $$HNO_3$$.
The reaction is as follows:
$$Pb_3O_4 + HNO_3 \rightarrow Pb(NO_3)_2 + PbO_2 + H_2O$$
The lead oxide $$(a)$$ is $$Pb_3O_4$$ which is non-polar and insoluble in water, changes to another insoluble oxide $$ (b)$$ $$PbO_2$$  and soluble salt $$(c) Pb(NO_3)_2$$ on reaction with $$HNO_3$$.

Chemistry

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