N{a₂}{B₄}{Og}.10{H₂}O xrightarrow{Delta } X + NaB{O₂} + {H₂}O X + C{r₂}{O₃}xrightarrow

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p-Block Elements - I

hard

$N{a_2}{B_4}{O_7}.10{H_2}O \xrightarrow{\Delta } X + NaB{O_2} + {H_2}O$

$X + C{r_2}{O_3}\xrightarrow{\Delta }Y$ (Green coloured)

$X$ and $Y$ are

A

$Na_3BO_3, Cr(BO_2)_3$

B

$Na_2B_4O_7, Cr(BO_2)_3$

C

$B_2O_3, Cr(BO_2)_3$

D

$B_2O_3, CrBO_3$

Solution

Reaction of process: $Na _2 B _4 O _7 \cdot 10 H _2 O \stackrel{\text { Heat }}{\rightarrow} B _2 O _3+ NaBO _2+ H _2 O$

$3 B _2 O _3+ Cr _2 O _3 \stackrel{\text { Heat }}{\rightarrow} 2 Cr \left( BO _2\right)_3$

Standard 11

Chemistry

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(IIT-2022)