Which base among the following reacts with diborane to cleave it unsymmetrically ?
$T.H.F.$
$Me_3N$
$C_5H_5N$
$MeNH_2$
$T.H.F. , Me_3N , C_5H_5N$ give symmetrical cleavage.
The hardest substance amongst the following is
Which of the following is an amphoteric oxide
$N{a_2}{B_4}{O_7}.10{H_2}O \xrightarrow{\Delta } X + NaB{O_2} + {H_2}O$
$X + C{r_2}{O_3}\xrightarrow{\Delta }Y$ (Green coloured)
$X$ and $Y$ are
Draw the structure of boric acid showing hydrogen bonding. Which species is present in water? What is the hybridizations of boron in this species?
The $+1 -$ oxidation state in group $-13$ and $+2$ oxidation state in group $-14$ becomes more and more stable with increasing atomic number. Explain.
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