
- A

- B

- ✓

- D







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Assertion $A:$ $3.1500\,g$ of hydrated oxalic acid dissolved in water to make $250.0\,mL$ solution will result in $0.1\,M$ oxalic acid solution.
Reason $R:$ Molar mass of hydrated oxalic acid is $126\,g\,mol ^{-1}$.
In the light of the above statements, chose the correct answer from the options given below:

Assertion $(A):$ The ionic radii of $O ^{2-}$ and $Mg ^{2+}$ are same.
Reason $( R )$ : Both $O ^{2-}$ and $Mg ^{2+}$ are isoelectronic species.
In the light of the above statements, choose the correct answer from the options given below
$\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{\,\,{R_1}} \\
|
\end{array}} \\
{R - C - X} \\
| \\
{\,\,{R_2}}
\end{array}\xrightarrow{{HOH}}\begin{array}{*{20}{c}}
{\begin{array}{*{20}{c}}
{\,\,{R_1}} \\
|
\end{array}\,\,\,\,\,} \\
{R - C - OH} \\
{|\,\,\,} \\
{{R_2}}
\end{array}$
Which substrate will give maximum racemisation?