Match the name of the processes given in column-I with type of metallurgical methods given in column-II. {:("Column-I","Column-II"),((a)"Hall-Heroult process",(p)"Molten" Al_2O_3+Na_3AIF_6 "electrolysis"),((b)"Dow's sea water process",(q)"Molten" MgCl_2+CaCl_2+NaCl "electrolysis"),((c)"Hoop's process",(r)"Molten impure aluminium + fluorides of" Na^+, Ba^(2+) and Al^(3+)"electrolysis"),((d)"Mac-Arthur Forrest process",(s)"Complex formation and displacement method"):}

Match the name of the processes given in column-I with type of metallu

1.	Match the name of the processes given in column-I with type of metallurgical methods given in column-II. {:("Column-I","Column-II"),((a)"Hall-Heroult process",(p)"Molten" Al_2O_3+Na_3AIF_6 "electrolysis"),((b)"Dow's sea water process",(q)"Molten" MgCl_2+CaCl_2+NaCl "electrolysis"),((c)"Hoop's process",(r)"Molten impure aluminium + fluorides of" Na^+, Ba^(2+) and Al^(3+)"electrolysis"),((d)"Mac-Arthur Forrest process",(s)"Complex formation and displacement method"):}
Answer» Solution :(a)Half-Heroult PROCESS is the electrolytic reduction of molten `Al_2O_3` dissolved in cryolite or fluorspar. (b)Dow's sea water process involves the isolation of Mg from sea water as `MgCl_2` and then electrolytic reduction of molten `MgCl_2` dissolved in `CaCl_2` and NaCl. (c)HOOP's process is the electrolytic PURIFICATION of impure aluminium.The cell has three liquid layers middle one contains fluorides of `Na^(+),Ba^(2+), and Al^(3+)`, lower most layer has impure Al. (d)Mac-Arthur forest cyanide process is the process used for the EXTRACTION of gold and silver.Extraction of gold and silver involves LEACHING the metal with `CN^(-)` .the metal is later recovered by displacement method.