Which one is a pseudo alum
$(NH_4)_2SO_4.Fe_2(SO_4)_3.24H_2O$
$K_2SO_4.Cr_2(SO_4)_3.24H_2O$
$MnSO_4.Al_2(SO_4)_3.24H_2O$
None of these
Which of the following is known as inorganic benzene
In diborane, the two $H - B - H$ angles are nearly
Which match is not incorrect ?
Among the following, the correct statement(s) is(are)
$[A]$ $\mathrm{A} 1\left(\mathrm{CH}_3\right)_3$ has the three-centre two-electron bonds in its dimeric structure
$[B]$ $\mathrm{BH}_3$ has the three-centre two-electron bonds in its dimeric structure
$[\mathrm{C}] \mathrm{AlCl}_3$ has the three-centre two-electron bonds in its dimeric structure
$[D]$ The Lewis acidity of $\mathrm{BCl}_5$ is greater than that of $\mathrm{AlCl}_5$
In $B_2H_6$