MCQ
Ammonium hydroxide is a weak base because
- AIt has low vapour pressure
- ✓It is only slightly ionized
- CIt is not a hydroxide of any metal
- DIt has low density
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$(I)\,\,La(OH)_3$ is the least basic among hydroxides of lanthanides.
$(II) \,\,Zr^{4+}$ and $Hf^{4+}$ posses almost the same ionic radii.
$(III)\,\,Ce^{4+}$ can as an oxidizing agent
Which of the above is/are true ?