MCQ
Which of the following complex or complex ion can have optically active isomer-
- ✓$[Pd(en)_2]^{2+}$
- B$[Co(H_2O)_4Cl_2] Cl \cdot 2H_2O$
- C$Na_2[ZnCl_4]$
- D$[Pt(en)_2]^{2+}$
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where $pK_1 , pK_2, pK_3$ are first ionization constants. Incorrect order is
$(R=8.314\,J\, mol^{-1}\,K^{-1})$
phenol $\xrightarrow[{reaction}]{{\operatorname{Re} imer - Tiemann}}X\xrightarrow[{(ii)\,{H^ \oplus }}]{{(i)\,NaOH\,conc}}Z$
Product $Z$ is