1
Question
2PbS+3O2⟶A+2SO2
The name of A is :
The name of A is :
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Solution
The correct option is D Iitharge
ROASTING The removal of excess sulphur contained in sulphide ores by heating in an excess of air is called roasting. The concentrated sulphide ore is heated in a reverberatory furnace, below its melting point or fusion temperature in the presence of excess of air with or without the addition of an external substance. In roasting definite chemical changes like oxidation, chlorination etc. take place but in calcination no major chemical changes occur.
Advantages of Roasting (i) Excess of sulphur is removed as volatile oxide. (ii) The metal sulphide is converted into metal oxide. (iii) Impurities of arsenic and antimony are removed as their volatile oxides.
Reaction:2PbS+3O2→2PbO+2SO2 Litharge
ROASTING
The removal of excess sulphur contained in sulphide ores by heating in an excess of air is called roasting. The concentrated sulphide ore is heated in a reverberatory furnace, below its melting point or fusion temperature in the presence of excess of air with or without the addition of an external substance. In roasting definite chemical changes like oxidation, chlorination etc. take place but in calcination no major chemical changes occur.
Advantages of Roasting
(i) Excess of sulphur is removed as volatile oxide.
(ii) The metal sulphide is converted into metal oxide.
(iii) Impurities of arsenic and antimony are removed as their volatile oxides.
Reaction:
2PbS+3O2→2PbO+2SO2
Litharge
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