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Chemistry
Which of the reaction is suitable for concentrating ore by leaching process ?
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Q. Which of the reaction is suitable for concentrating ore by leaching process ?
JEE Main
JEE Main 2022
General Principles and Processes of Isolation of Elements
A
$2 Cu _2 S +3 O _2 \rightarrow 2 Cu _2 O +2 SO _2$
B
$Fe _3 O _4+ CO \rightarrow 3 FeO + CO _2$
C
$Al _2 O _3+2 NaOH +3 H _2 O \rightarrow 2 Na \left[ Al ( OH )_4\right]$
D
$Al _2 O _3+6 Mg \rightarrow 6 MgO +4 Al$
Solution:
$Al _2 O _3+2 NaOH +3 H _2 O \rightarrow 2 Na ,\left[ Al ( OH )_4\right]$ Leaching.