On heating, lead (ll) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless — JEE Mains Chemistry Past Papers Chemistry Question
Question
On heating, lead (ll) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to ablue solid (C). The oxidation number of nitrogen in solid (C) is : (A) +5 (B) +3 (C) +4 (D) +2
Answer: B
💡 Solution & Explanation
id/liquid (B). (B) on heating with NO changes to ablue solid (C). The oxidation number of nitrogen in solid (C) is : (1) +5 (2) +3 (3) +4 (4) +2 Ans. (2) Sol. Pb(NO3)2 PbO + 2NO2(g) (brown gas) ‘B’ 2NO2(g) cooling N2O4 ‘B’ ‘C’ NO2(g) + NO(g) 3 2O N ‘D’ | JEE MAIN-2020 | DATE : 04-09-2020 (SHIFT-1) | PAPER-1 | OFFICIAL PAPER | CHEMISTRY PAGE # 5
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