An aqueous solution of borax is

Which statement is correct for $B_2H_6$?

Which of the following equations is not correctly matched?

$Na_2B_4O_7 \cdot 10H_2O \xrightarrow{\Delta} 2NaBO_2 + B_2O_3 (A) + 10H_2O$. $(A) + MnO \xrightarrow{\Delta} Mn(BO_2)_2 (B)$. $(A)$ and $(B)$ are

Which elements of group $13$ possess both $+1$ and $+3$ oxidation state?

Which one of the following elements is unable to form $MF_{6}^{3-}$ ion?