JAMB Chemistry 2014 Question 31

Question 31

Metals and their Compounds

Which of the following will liberate hydrogen from dilute tetraoxosulphate(VI) acid?

A.Lead.
B.Magnesium.
C.Copper.
D.Gold.

Show the answer and explanation

Answer: B (Magnesium.)

Explanation

Magnesium is above hydrogen in the activity series and reacts readily with dilute acid; copper and gold do not, and lead is stopped by insoluble PbSO₄.