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JEE Main 20238 AprilMorning Shift

Exam: JEE Main
Year: 2023
Date: 8 April
Shift: Morning Shift
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

JEE Main 2023 · 8 April · Morning Shift · Chemistry · General Principles and Processes of Isolation of Metals

Which of the following metals can be extracted through alkali...

Which of the following metals can be extracted through alkali leaching technique?

Options

A $Sn$
B $Pb$
C $Au$
D $Cu$

Correct answer

A. $Sn$

Step-by-step solution

Leaching is often used if the ore is soluble in some suitable solvent. The ore of tin metal is cassiterite( ${SnO}_{2}$ ). Cassiterite is readily soluble in alkali. The reaction is shown below.
${SnO}_{2} + 2NaOH + 2{H}_{2}O \to {Na}_{2}\left[Sn ( OH{)}_{6}\right]$

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