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 rarr 2ZnO+2SO` (80% conversion) `ZnO+H_2SO_4 rarr Zn SO_4+H_2O` (100% conversion) and `2ZnSO_4+2H_2O rarr 2Zn+2H_2SO_4+O_2` (80% conversion).The number of moles of `ZnS` required for producing 2 moles of `Zn` will be :

Zn+H_2SO_4 to

The chief are of Zn is the sulphide , ZnS. The are is concentrated by froth floation process and then heated in air to convert Zns to Zno. 2ZnS+30_(2)overset(80%)to 2ZnO+ 2SO_(2) ZnO+H_(2)SO_(4)overset(100%)to ZnSO_(4)+ H_(2) 2ZnSO_(4)+2H_(2)Ooverset(80%)to 2Zn+ 2H_(2)SO_(4)+O_(2) The number of moles of ZnS required for producing 2 moles of Zn will be:

Zn+H_(2)SO_(4)rarrZnSO_(4)+H_(2) Zn undergoes -

Which of the following ores can be concentrated by froth floatation method and why? Fe_2O_3, ZnS, Al_2O_3

Chief ore of Zn is ZnS . The ore is concentrated by froth flotation process and then heated in air to convert ZnS to ZnO . ltntgt 2 ZnS + 3O_(2) rarr 2 ZnO + 2 SO_(2) …(i) ZnO , thus formed is treated with dilute H_(2) SO_(4) . ZnO + H_(2) SO_(4) rarr ZnSO_(4) + H_(2) O ....(ii) On electrolysis of ZnSO_(4(aq)), Zn metal is produced. 2 ZnSO_(4) + H_(2) O rarr 2 Zn + 2H_(2) SO_(4) + O_(2) ....(iii) ZnO on dissolution in NaOH gives

Chief ore of Zn is ZnS . The ore is concentrated by froth flotation process and then heated in air to convert ZnS to ZnO . ltntgt 2 ZnS + 3O_(2) rarr 2 ZnO + 2 SO_(2) …(i) ZnO , thus formed is treated with dilute H_(2) SO_(4) . ZnO + H_(2) SO_(4) rarr ZnSO_(4) + H_(2) O ....(ii) On electrolysis of ZnSO_(4(aq)), Zn metal is produced. 2 ZnSO_(4) + H_(2) O rarr 2 Zn + 2H_(2) SO_(4) + O_(2) ....(iii) What mass of Zn will be obtained from an ore containing 225 kg of ZnS ? (Zn = 65, S = 32, O = 16, H = 1) .

Chief ore of Zn is ZnS . The ore is concentrated by froth flotation process and then heated in air to convert ZnS to ZnO . ltntgt 2 ZnS + 3O_(2) rarr 2 ZnO + 2 SO_(2) …(i) ZnO , thus formed is treated with dilute H_(2) SO_(4) . ZnO + H_(2) SO_(4) rarr ZnSO_(4) + H_(2) O ....(ii) On electrolysis of ZnSO_(4(aq)), Zn metal is produced. 2 ZnSO_(4) + H_(2) O rarr 2 Zn + 2H_(2) SO_(4) + O_(2) ....(iii) What volume of 98 % H_(2) SO_(4) (by weight, density = 1.8 g//mL ) is required in step (ii) ?

What information does the following chemical equations convey? Zn + H_2SO_4 to ZnSO_4 + H_2

Zn + 2NaOH rarr A + B

Balance the equations given below : ZnS+O_2 to ZnO + SO_2