Question

How many gm of silver will be displaced from a solution of $AgN{O}_3$ by $4gm$ of magnesium?

• A. 18 gm
• B. 4 gm
• C. 36 gm
• D. 16 gm

Answer 1

Answer: (C)

Given: Weight of magnesium = $4gm$,

We know that $\frac{\text{ Weight of silver displaced }(M)}{\text{ Weight of magnesium }}$

$=\frac{\text{ Equivalent weight of silver }}{\text{ Equivalent weight of magnesium }}$

or $\frac{M}{4}=\frac{108}{12}$

or $M=\frac{108\times 4}{12}=36gm$