In chromyl chloride test,the oxidation state | vedclass

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(D) The chromyl chloride test is used for the detection of chloride ions $(Cl^-)$. In this test,a chloride salt is heated with potassium dichromate $(

Vedclass · Accepted Answer

Remains constant

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(D) The chromyl chloride test is used for the detection of chloride ions $(Cl^-)$. In this test,a chloride salt is heated with potassium dichromate $(K_2Cr_2O_7)$ and concentrated sulfuric acid $(H_2SO_4)$. The reaction produces chromyl chloride $(CrO_2Cl_2)$ vapors. In $K_2Cr_2O_7$,the oxidation state of $Cr$ is $+6$. In $CrO_2Cl_2$,the oxidation state of $Cr$ is calculated as: $x + 2(-2) + 2(-1) = 0$,which gives $x - 4 - 2 = 0$,so $x = +6$. Since the oxidation state of $Cr$ is $+6$ in both the reactant $(K_2Cr_2O_7)$ and the product $(CrO_2Cl_2)$,it remains constant.

Column-$I$	Column-$II$
$(a) IBr$	$(i)$ Orange solid
$(b) ClF_3$	$(ii)$ Yellow-green liquid
$(c) BrF_3$	$(iii)$ Black solid
$(d) ICl_3$	$(iv)$ Colorless gas

In chromyl chloride test,the oxidation state of $Cr$ changes from

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Column-$I$ Column-$II$

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