An ore on heating in air produces sulphur dioxide. Which process would you suggest for its concentration? Describe briefly any two steps involved in the conversion of this concentrated ore into related metal.

Which process is used for the enrichment of suphide ore.explain in brief two steps involved in the extraction of metal from enriched suphide ore

Suphur dioxide (SO_2) gas is produced when a certain ore is heated write the method involved in the extraction of metal from this ore.

Two ores A and B were taken. On heating, ore A gives CO_2 whereas, ore B gives SO_2 . What steps will you take to convert them into metals?

In a particular experiment, a high vltage is created by charging an isolated metal sphereas shown in the fig. The sphere has diameter 42 cm and any charge on its surface may be considered as if IT were concentrated at its centre. The air surrounding the sphere loses its insultaing properties, causing a spark, when the electric field exceeds 20 kV cm^-1 by reference to an atom in the air, suggest the mechanism by which the electric field causes the air to become conducting.

The chief ore of Zn is the sulphide ZnS. The ore is concentrated by froth floatation process and then heated in air to convert ZnS to ZnO . 2ZnS+3O_3 80% rarr 2ZnO+2SO. ZnO+H_2SO_4 100% rarr Zn SO_4+H_2O and 2ZnSO_4+2H_2O 80% rarr 2Zn+2Hn+2H_2SO_4+O_2 . The number of moles of ZnS required for producing 2 moles of Zn will be :