Multiple Choice
Find the FALSE combination of a metallurgical process and its example:
A) leaching: 4 Au(s) + 8 CN-(aq) + O2(g) + 2 H2O(l) → 4 [Au(CN) 2]-(aq) + 4 OH-(aq)
B) reduction: ZnCO3(s) → ZnO(s) + CO2(g)
C) roasting: 2 Cu2S(s) + 3 O2(g) → 2 Cu2O(s) + 2 SO2(g)
D) precipitation: Zn2+(aq) + S2-(aq) → ZnS(s)
E) conversion: 2 Co(OH) 3(s) ![Find the FALSE combination of a metallurgical process and its example: A) leaching: 4 Au(s) + 8 CN-(aq) + O<sub>2</sub>(g) + 2 H<sub>2</sub>O(l) → 4 [Au(CN) <sub>2</sub>]<sup>-</sup>(aq) + 4 OH<sup>-</sup>(aq) B) reduction: ZnCO<sub>3</sub>(s) → ZnO(s) + CO<sub>2</sub>(g) C) roasting: 2 Cu<sub>2</sub>S(s) + 3 O<sub>2</sub>(g) → 2 Cu<sub>2</sub>O(s) + 2 SO<sub>2</sub>(g) D) precipitation: Zn<sub>2</sub>+(aq) + S<sub>2</sub>-(aq) → ZnS(s) E) conversion: 2 Co(OH) <sub>3</sub>(s) Co<sub>2</sub>O<sub>3</sub>(s) + 3 H<sub>2</sub>O(g)](https://d2lvgg3v3hfg70.cloudfront.net/TB2799/11eaaed0_3e6f_8d08_abb0_cdc6f374e28e_TB2799_11.jpg)
Co2O3(s) + 3 H2O(g)
Correct Answer:
Verified
Correct Answer:
Verified
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