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p-Block Elements - I
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${H_3}B{O_3}\,\xrightarrow{{{T_1}}}X\,\xrightarrow{{{T_2}}}Y\,\xrightarrow{{\operatorname{Re} d\,\,\,hot}}{B_2}{O_3}$
if $T_1 < T_2$ then $X$ and $Y$ respectively are
A
$X =$ Metaboric Acid, $Y =$ Tetraboric acid
B
$X =$ Tetraboric Acid, $Y =$ Metaboric acid
C
$X =$ Borax, $Y =$ Metaboric acid
D
$X =$ Tetraboric Acid, $Y =$ Borax
Solution
$H _3 BO _3 \stackrel{100^{\circ} C }{\longrightarrow} HBO _2 \stackrel{160^{\circ} C }{\longrightarrow} H _2 B _4 O _7 \stackrel{\text { red hot }}{\longrightarrow} B _2 O _3$
$X$ is $HBO _2$ which is metaboric acid and $Y$ is $H _2 B _4 O _7$ which is tetraboric acid.
Standard 11
Chemistry
