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p-Block Elements - I
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$N{a_2}{B_4}{O_7}.10{H_2}O\xrightarrow{{Heat}}X + NaB{O_2} + {H_2}O,X + C{r_2}{O_3}\xrightarrow{{Heat}}\mathop Y\limits_{\left( {Green\,coloured} \right)} $ $X$ and $Y$ are
A
$Na_3BO_3$ and $Cr(BO_2)_3$
B
$Na_2B_4O_7$ and $Cr(BO_2)_3$
C
$B_2O_3$ and $Cr(BO_2)_3$
D
$B_2O_3$ and $CrBO_3$
Solution
Reaction of process:
$Na _2 B _4 O _7 \cdot 10 H _2 O \stackrel{\text { Heat }}{\rightarrow} B _2 O _3+ NaBO _2+ H _2 O$
$3 B _2 O _3+ Cr _2 O _3 \stackrel{\text { Heat }}{\longrightarrow} 2 Cr \left( BO _2\right)_3$
Standard 11
Chemistry
