1.

Which one of the following elemen does not dissolve in fused or aqueous alkalies?

Answer»

BORON
Silicon
Aluminium
None of these

Solution :Boron dissolved in fused ALKALIES according to the following REACTION.
`2B+6NaOHoverset("fused")to2Na_(3)BO_(3)+3H_(2)`
Silicon and aluminium dissolved in both fused and aqueous alkalies.


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