MCQ
Alumina is
- AAcidic
- BBasic
- ✓Amphoteric
- DNone of these
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$[A]$ $\mathrm{Cr}_2 \mathrm{O}_3, \mathrm{BeO}, \mathrm{SnO}, \mathrm{SnO}_2$
$[B]$ $\mathrm{Cr}_2 \mathrm{O}_3, \mathrm{CrO}, \mathrm{SnO}, \mathrm{PbO}$
$[C]$ $\mathrm{NO}, \mathrm{B}_2 \mathrm{O}_3, \mathrm{PbO}, \mathrm{SnO}_2$
$[D]$ $\mathrm{ZnO}, \mathrm{Al}_2 \mathrm{O}_3, \mathrm{PbO}, \mathrm{PbO}_2$
(image) $\xrightarrow{{HOH/\mathop H\limits^ \oplus }}$ $[X]$
$[X]$ will be :
What is $Z$ ?
[Given : Molal depression constant and density of water are $1.86\, K\, kg\, mol^{-1}$ and $1\, g\, cm^{-3}$ respectively.]
