MCQ
The ring deuteration of phenol
- ✓Lowers the acidity
- BIncreases the acidity
- CImparts no effect
- DCauses amphoteric nature
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$(1)$ trans $-[Co(NH_3)_4 Cl_2]^+$
$(2)$ cis $-[Co(NH_3)_2 (en)_2]^{3+}$
$(3)$ trans $-[Co(NH_3)_2(en)_2]^{3+}$
$(4)$ $NiCl^{2-}_4$
$(5)$ $TiF^{2-}_6$
$(6)\, CoF^{3-}_6$
Choose the correct code
$R - \mathop {\mathop C\limits^{||} }\limits^O - OH\xleftarrow{{{H_3}{O^ + }}}X\xrightarrow{{[H]}}RC{H_2}N{H_2};$
'$X$' is