MCQ
$IUPAC$ name of complex $K_3[Al(C_2O_4)_3]$ is :
- APotassium alumino-oxalate
- ✓Potassium trioxalatoaluminate $(III)$
- CPotassium aluminium $(III)$ oxalate
- DPotassium trioxalatoaluminate $(IV)$

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(Given : $R =8.3 \,J \,K ^{-1}\, mol ^{-1}$ )
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$1.$ Which one of the following reagents is used in the above reaction?
$(A)$ aq. $\mathrm{NaOH}+\mathrm{CH}_3 \mathrm{Cl}$
$(B)$ aq. $\mathrm{NaOH}+\mathrm{CH}_2 \mathrm{Cl}_2$
$(C)$ aq. $\mathrm{NaOH}+\mathrm{CHCl}_3$
$(D)$ aq. $\mathrm{NaOH}+\mathrm{CCl}_4$
$2.$ The electrophile in this reaction is
$(A)$ : $\mathrm{CHCl}$ $(B)$ ${ }^{+} \mathrm{CHCl}_2$
$(C)$ $\mathrm{CCl}_2$ $(D)$. $\mathrm{CCl}_3$
$3.$ The structure of the intermediate $I$ is
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Give the answer question $1, 2$ and $3.$

