pBlock ElementsII 1 Question 22

22. Which gas is evolved when PbO2 is treated with concentrated HNO3 ?

(2005)

(a) NO2

(b) O2

(c) N2

(d) N2O

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Answer:

Correct Answer: 22. (b)

Solution:

  1. PbO2+HNO3Pb(NO3)2+H2O+O2


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