(C) The thermal decomposition of potassium dichromate $(K_2Cr_2O_7)$ is given by the following balanced chemical equation:$4K_2Cr_2O_7 \xrightarrow{\D

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(C) The thermal decomposition of potassium dichromate $(K_2Cr_2O_7)$ is given by the following balanced chemical equation:$4K_2Cr_2O_7 \xrightarrow{\Delta} 4K_2CrO_4 + 3O_2 + 2Cr_2O_3$Comparing this with the given reaction,the species $X$ corresponds to $2Cr_2O_3$. Therefore,$X$ is $Cr_2O_3$.

Class 12 Chemistry d-and f-Block Elements Compounds of Transitional elements

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In the reaction $4K_2Cr_2O_7 \xrightarrow{\text{heat}} 4K_2CrO_4 + 3O_2 + X$,the species $X$ is:

A
$CrO_3$
B
$Cr_2O_7$
C
$Cr_2O_3$
D
$CrO_5$

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d-and f-Block Elements

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Compounds of Transitional elements

$X + H^{+} \rightarrow Y + Na^{+} + H_2O$
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In the reaction $4K_2Cr_2O_7 \xrightarrow{\text{heat}} 4K_2CrO_4 + 3O_2 + X$,the species $X$ is:

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$X + H^{+} \rightarrow Y + Na^{+} + H_2O$ $Y + KCl \rightarrow K_2Cr_2O_7 + NaCl$ Identify $X$ and $Y$ in the given reactions.

The green colour produced in the borax bead test of a chromium$(III)$ salt is due to formation of . . . . . . :

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$X + H^{+} \rightarrow Y + Na^{+} + H_2O$
$Y + KCl \rightarrow K_2Cr_2O_7 + NaCl$
Identify $X$ and $Y$ in the given reactions.