JEE Mains 28-July-2022 Shift 1 Solved Paper

Section: Chemistry

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Question : 66 of 90

Marks: +1, -0

Which of the reaction is suitable for concentrating ore by leaching process?

[28-Jul-2022-Shift-1]

2Ch2S+3O2→2Cu2O+2SO2
Fe3O4+CO→3‌FeO+CO2
Al2O3+2‌NaOH+3H2O→2‌Na[Al(OH)4]
Al2O3+6‌Mg→6‌MgO+4‌Al

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