The most acidic of the following compounds is
${P_2}{O_3}$
$S{b_2}{O_3}$
${B_2}{O_3}$
$A{s_2}{O_3}$
Which of the following is only acidic in nature
The molecular formula of felspar is
The most abundant metal in the earth crust is
Which of the following is formed when aluminium oxide and carbon is strongly heated in dry chlorine gas
$BF_3$ on hydrolysis forms