MCQ
Which of the following is a low-spin complex?
- A$[Ni(NH_3)_6]^{2+}$
- B$[Ti(H_2O)_6]^{3+}$
- C$[Cr(NH_3)_6]^{3+}$
- ✓$[Fe(NH_3)_6)^{3+}$
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$(A)$ Upon heating, $H _3 PO _3$ undergoes disproportionation reaction to produce $H _3 PO _4$ and $PH _3$.
$(B)$ While $H _3 PO _3$ can act as reducing agent, $H _3 PO _4$ cannot.
$(C)$ $H _3 PO _3$ is a monobasic acid.
$(D)$ The $H$ atom of $P - H$ bond in $H _3 PO _3$ is not ionizable in water.