Lead pipes are not suitable for drinking water because
A
A layer of lead dioxide is deposited over pipes
B
Lead reacts will water containing air to form $$Pb(OH)_{2}$$
C
Lead reacts with air to form litharge
D
Lead forms basic lead carbonate
Correct option is C. Lead reacts will water containing air to form $$Pb(OH)_{2}$$
Lead pipes are not suitable for drinking water because Lead reacts will water containing air to form $$Pb(OH)_{2}$$ which is poisonous for our health.
Hence, Option "C" is the correct answer.