Assertion : Boron is metalloid.
Reason : Boron shows metallic nature.
If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
If the Assertion is correct but Reason is incorrect.
If both the Assertion and Reason are incorrect.
The most abundant metal in the earth crust is
Write preparation of diborane and give physical and chemical properties of it.
Conc. $HN{O_3}$
Suggest reasons why the $B-F$ bond lengths in $BF $$_{3}(130 \,pm )$ and $B F_{4}^{-}(143\, pm )$ differ.
Lithium aluminium hydride reacts with silicon tetrachloride to form