Match the compounds given in Column I with the characteristic of products given in Column II.
`{:("Column I","Column II"),((A)K_2MnO_4,(p)"Transition element in +6 state."),((B)KMnO_4,(q)"Colour due to charge transfer."),(( C)K_2Cr_2O_7,(r)"Manufactured from pyrolusite ore."),((D)K_2CrO_4,(s)"Manufactured from chromite ore"):}`

Answer

A`to`p,r ; B`to`q,r ; C`to`p,q,s ; D`to`p,q,s

Explanation

(A)`overset(+6)(MnO_4^(2-)) , 2MnO_2 ("pyrolusite")+4KOH+O_2to2K_2MnO_4+2H_2O`
(B)`overset(+7)(MnO_4^-)to` colour due to charge transfer.
`2MnO_2("pyrolusite")+4KOH+O_2 to 2K_2MnO_4 + 2H_2O`
`MnO_4^(2-)overset("electrolytic oxidation")to MnO_4^(-)+e^-`
(C )`overset(+6)Cr_2O_7^(2-)`, Colour due to charge transfer.
`4FeO. Cr_2O_3`(chromite ore) +`8Na_2CO_3+7O_2 underset("in air")overset("Roasting")to8Na_2CrO_4 + 2Fe_2O_3 + 8CO_2`
`2Na_2CrO_4 + H_2SO_4 to Na_2Cr_2O_7 + Na_2Cr_2O_7 + Na_2SO_4 + H_2O`
`Na_2Cr_2O_7 + 2KCl to K_2Cr_2O_7 + 2 NaCl`
(D)`overset(+6)(CrO_4^(2-))`, Colour due to charge transfer
`4FeO. Cr_2O_3`(chromite ore)+`8Na_2CO_3 + 7O_2 underset("in air")overset("Roasting")to8Na_2CrO_4 + 2Fe_2O_3 +8CO_2`