JAMB Chemistry 2003 Question 36

Question 36

Metals and their Compounds

The metal that liberates hydrogen from cold water in bubbles only is

A.Na
B.K
C.Ca
D.Al

Show the answer and explanation

Answer: C (Ca)

Explanation

Calcium sinks and reacts steadily with cold water, giving a stream of hydrogen bubbles. Sodium and potassium react violently, darting about on the surface; aluminium hardly reacts.