The gaseous product $(s)$ expected at room temperature by reaction of sodium borohydride and boron trifluoride under anhydrous conditions is/are:
$H_2$
$B_2H_6$ and $H_2$
$B_2H_6$
$BH_2F$ and $H_2$
Aluminium oxide is not reduced by chemical reactions since
Boron cannot form which one of the following anions ?
Match List $I$ with List $II$. Choose the correct answer from the options given below:
List $-I$ | List $-II$ |
$A.$ Melting point $[\mathrm{K}]$ |
$I.$ $\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}>\mathrm{Al}>\mathrm{B}$ |
$B.$ Ionic Radius $\left[\mathrm{M}^{+3} / \mathrm{pm}\right]$ |
$II.$ $\mathrm{B}>\mathrm{Tl}>\mathrm{Al} \approx \mathrm{Ga}>\mathrm{In}$ |
$C.$ $\Delta_{\mathrm{i}} \mathrm{H}_1 $ $ [\mathrm{~kJ} \mathrm{~mol}^{-1}]$ | $III.$ $\mathrm{Tl}>\mathrm{In}>\mathrm{Al}>\mathrm{Ga}>\mathrm{B}$ |
$D.$ Atomic Radius $[pm]$ | $IV.$ $\mathrm{B}>\mathrm{Al}>\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}$ |
Write balanced equations for:
$(i)$ $BF _{3}+ LiH \rightarrow$
$(ii)$ $B _{2} H _{6}+ H _{2} O \rightarrow$
$(\text { iii }) NaH + B _{2} H _{6} \rightarrow$
$(i v) H_{3} B O_{3} \stackrel{\Delta}{\longrightarrow}$
$( v ) Al + NaOH \rightarrow$
$( v i ) B _{2} H _{6}+ NH _{3} \rightarrow$
Which of the following cation can not give borax bead test ?