1.

Which gas is evolved when PbO_(2) is treated with conc. HNO_(3) ?

Answer»

`NO_(2)`
`O_(2)`
`N_(2)`
`N_(2)O`

SOLUTION :`2PbO_(2) + 4HNO_(3) rarr 2Pb(NO_(3))_(2) + 2H_(2)O + O_(2)`


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