MCQ
A zwitter ion is
- AA positively charged ion without a metal atom in it
- BA negatively charged ion without metal atom in it
- ✓An ion with positive and negative charges at different points on it
- DA heavy ion with a small charge on it
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$PhCHO + Ph \cdot CHO \xrightarrow[in\,\,{{D}_{2}}O]{NaOD} A + \begin{matrix} O \\ || \\ Ph-C-{{O}^{-}} \\ \end{matrix}$$\left( Ph\right.$ is $\left.- C _{6} H _{5}\right)$

