MCQ
When tin is treated with concentrated nitric acid
- AIt is converted into stannous nitrate
- BIt is converted into stannic nitrate
- ✓It is converted into metastannic acid
- DIt becomes passive
$Sn + 4HN{O_3} \to {H_2}Sn{O_3} + 4N{O_2} + {H_2}O$
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$NH_2-CH_2-CH_2-NH_2 +$ $\begin{array}{*{20}{c}}
{COO{C_2}{H_5}} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{COO{C_2}{H_5}}
\end{array}$ $\xrightarrow{{Pyridne}}$ $[X]$
$[X]$ will be :
