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(B) The reaction sequence describes the chromyl chloride test and related chemistry:$1$. $(T)$ is $K_2Cr_2O_7$ (orange-red,but often associated with d

Vedclass · Accepted Answer

$T = K_2Cr_2O_7, U = NH_4Cl, V = CrO_2Cl_2, W = Ag_2CrO_4, X = [Ag(NH_3)_2]^+, Y = AgCl, Z = NH_3$

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(B) The reaction sequence describes the chromyl chloride test and related chemistry:$1$. $(T)$ is $K_2Cr_2O_7$ (orange-red,but often associated with dichromate chemistry).$2$. $K_2Cr_2O_7 + NH_4Cl + conc. H_2SO_4 \rightarrow CrO_2Cl_2$ (Chromyl chloride,$V$,red gas).$3$. $CrO_2Cl_2 + NaOH \rightarrow Na_2CrO_4$ (yellow solution),which with $AgNO_3$ gives $Ag_2CrO_4$ (red ppt.,$W$).$4$. $Ag_2CrO_4 + NH_3 \rightarrow [Ag(NH_3)_2]^+$ (soluble complex,$X$).$5$. $Ag_2CrO_4 + dil. HCl \rightarrow AgCl$ (white ppt.,$Y$).$6$. $NH_4Cl + NaOH \xrightarrow{\Delta} NH_3$ (gas,$Z$,gives white fumes with $HCl$).

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