Question

Two metals A and B have standard reduction potential values, −0.76 V and +0.34 V, respectively.

Which of these metals will liberate H₂ gas from dil. H₂SO₄? Why?

Answer 1

Metal ‘A’ will liberate H₂ gas from a dilute H₂SO₄ solution. This is because its standard reduction potential (−0.76 V) is lower than that of hydrogen (0 V), making it a stronger reducing agent that can displace hydrogen from acids.