Question

Iron can liberate $H_2$ from dil. $H_{2}S{O}_4$ but copper cannot liberate $H_2$ from dil. $H_{2}S{O}_4$ because :

• A. iron is above than hydrogen in the activity series.
• B. copper is below in activity series than hydrogen
• C. both A and B
• D. none of these

Answer 1

Answer: (C)

both A and B

$K$

$Ca$
$Zn$ Reactivity decreases moving down.
$Fe$
$H$
$Cu$
So, it is clear from the activity series that iron is above the hydrogen in the series and it can replace hydrogen from sulphuric acid while copper is below the hydrogen and is less reactive than hydrogen so, cannot replace hydrogen.