MCQ
Which of the following compound does not react with cold and dil. $HNO_3$ ?
- A$PbO$
- ✓$PbO_2$
- C$FeSO_4$
- D$PbCl_2$
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$(i)\,\,(CH_3)_2CH-CH_2Br \xrightarrow{{{C_2}{H_5}OH}} (CH_3)_2CH-CH_2OC_2H_5 + HBr$
$(ii)\,\,(CH_3)_2CH-CH_2-Br \xrightarrow{{{C_2}{H_5}{O^- }}} (CH_3)_2CH-CH_2OC_2H_5 + Br^-$
The mechanisms of reaction $(i)$ and $(ii)$ are respectively
