Chemistry Answers: Mcq's of Acid, Basis and Salts:

Which of the following reacts with HCl to give Hydrogen?
A-ammonia
B-iron
C-potassium manganate(VII)
D-silver
E-sodium hydroxide

SOLUTION:
The correct answer is iron (B)

REASON:
Metals which are more active than hydrogen can displace it from acids.