MCQ
Due to diagonal relationship between $Be$ and $Al$:
- ABoth are metals
- BBoth are metalloids
- ✓Both form polymeric covalent hydrides
- DNone of these
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$I.$ monosubstituted alkene
$II.$ disubstituted alkene
$III.$ trisubstituted alkene
Which of the following statement(s) is(are) correct ?
$(a)$ 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 :
