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 $K _2 O _2 Al _2 O _3 \cdot 6 SiO _2$.
Two students were given the task to prepare an adduct $NH_3 \to BH_3$ at low temperature :-
Student $I$ :- She mixed $B_2H_6$ and $NH_3$
Student $II$ :- He mixed $B_2H_6$ with $THF$ followed by addition of $NH_3$
Which student is expected to get the $CORRECT$ final product ?
Give important trends and anomalous properties of boron.
Which of the following is an amphoteric oxide
An element $A$ dissolves both in acid and alkali. It is an example of
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