The molecular formula of felspar is
${K_2}O\,.\,A{l_2}{O_3}.\,6Si{O_2}$
${K_2}O\,.\,3A{l_2}{O_3}.\,6Si{O_2}$
$N{a_3}Al{F_6}$
$CaS{O_4}.\,2{H_2}O$
Feldspar is $K _2 O _2 Al _2 O _3 \cdot 6 SiO _2$.
Write reactions to justify amphoteric nature of aluminium.
The correct statements among $I$ to $III$ regarding group $13$ element oxides are,
$I$. Boron trioxide is acidic
$II$. Oxides of aluminium and gallium are amphoteric
$III$. Oxides of indium and thallium are basic
The incorrect statement regarding above reactions is
$\mathop {Al}\limits_{metal} \xrightarrow[{(aq.)}]{{HCl}}'X' + Gas\,'P'$
$\mathop {Al}\limits_{metal} \xrightarrow[{ + {H_2}O}]{{NaOH\,(aq.)}}'Y' + Gas\,'Q'$
$Al_4C_3$ is an ionic carbide, named as
Given below are the statements about diborane.
$(a)$ Diborane is prepared by the oxidation of $\mathrm{NaBH}_{4}$ with $\mathrm{I}_{2}$.
$(b)$ Each boron atom is in sp $^{2}$ hybridized state.
$(c)$ Diborane has one bridged $3$ centre$-2-$electron bond.
$(d)$ Diborane is a planar molecule.
The option with correct statement(s) is :
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