Question

Which metal displace hydrogen from acids?

• A. $Hg$
• B. $Ca$
• C. $Zn$
• D. $Al$

Answer 1

Answer: (A)

$Hg$

Answer 2

The metals placed above hydrogen in the electrochemical series, can displace hydrogen from acids. Ca, Zn and Al are placed above while Hg is placed below hydrogen in electrochemical series. Hence, Hg cannot displace hydrogen from acids.