MCQ
The acid which forms two series of salts is
- A${H_3}P{O_4}$
- ✓${H_3}P{O_3}$
- C${H_3}B{O_3}$
- D${H_3}P{O_2}$
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$\begin{array}{*{20}{c}}
H\\
|\\
{ClHC = HC - C - CH = CHCl}\\
|\\
{Cl}
\end{array}$
The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is :