Chemistry - Stoichiometry Question with Solution | TestHub
ChemistryStoichiometryBasic Methods of Calculations (POAC, LR)Medium2 minQB
ChemistryMediumnumerical
Passage / Comprehension
Chief ore of zinc is zinc blende (ZnS). The ore is concentrated by the froth flotation process and then heated in air to convert ZnS to ZnO.
2ZnS + 3O2 → 2ZnO + 2SO2 .............(i)
(i) The ZnO thus formed is treated with dilute sulphuric acid :
ZnO + H2SO4 → ZnSO4 + H2O........ ..(ii)
On electrolysis of zinc sulphate, zinc metal is produced :
ZnSO4 + H2O → Zn + H2SO4+ O2 ........ (iii)
How many kmoles of NaOH are required to dissolve all the ZnO produced in reaction (i) ?
Answer:
4.62
Solution:
The correct answer is 4.62-4.64
Stream:JEESubject:ChemistryTopic:StoichiometrySubtopic:Basic Methods of Calculations (POAC, LR)
⏱ 2mℹ️ Source: QB
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