Metallurgical Process

Consider the following metallurgical processes : (1) Heating impure metal with CO and distilling the resulting volatile carbonyl (BP 43^@ C) and finally decomposing at 150^@C to 230^@ C to get pure metal. (2) Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged sulphide. (3) Electrolysing the molten electrolyte containing CaCl_(2) to obtain the metal The processes used for obtaining sodium, nickel, and copper are, respectively

Consider the following metallurgical processes : (I) Heating impure metal with CO and distilling the resulting volatile carbonyl (b.p. 43^(@)C) and finally decomposition at 150^(@)-200^(@)C to get the pure metal. (II) Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged metal sulphide. (III) Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and NaCl to obtain the metal. The processes used for obtaining magnesium , nickel and copper are respectively.

The set having incorrect statement is 1. the Hall-Heroult process is used for the production of aluminum and iron 2. pig iron is obtained from cast iron. 3. the blistered appearance of copper during the metallurgical process is due to the evolution of CO_2 4. leaching of bauxite using concentrated NaOH solution gives sodium aluminate and sodium silicate

Consider two chemical reactions (A) and (B) that take place during metallurgical process: (A) ZnCO_(3(s)) overset(Delta)to ZnO_((s)) +CO_(2(g)) " " (B) 2ZnS_((s)) +3O_(2(g)) overset(Delta)to ZnO_((s)) +2SO_(2(g)) The correct options of names given to them respectively is:

Answer the following : (a) Name of element of group 13 which forms the most stable compound in +1 oxidation state. (b) Name the element of group 13 which has the highest first ionisation enthalpy. ( c) Name the element of group 13 which is used as a reducing agent in metallurgical processes. (d) Name of element of group 13 which can show convalency maximum of four only. Name the compound of aluminium which is used as a germicide and coagulant of the purification of water. (f) Name the first two elements of group 13 .