Question

who were the moderates and the radicals of the congress?

Answer 1

Moderates were the one's who were very liberal on their objectives and methods.
The criticized British rule by making demands through speeches and articles.

Radicals were the ones who believed in the importance of self reliance and constructive work and not rely on the good intentions of the British Government. The believed in violence.

Answer 2

Hey mate, here is the answer to your question...

MODERATES: Most of the congress members were Indians who had faith in the British and believed in submitting petitions to have their grievances redressed. They only wanted gradual reforms. They came to be called the moderates.

Example- Surendranath Banerjee, Pherozshah Mehta and Gopal Krishna Gokhale

RADICALS: Some Indian leaders, like Bal gangadhar Tilak in Maharashtra and Lala Lajpat Rai in Punjab realised the furtility of petitioning the British. They demanded swaraj or self-rule. These leaders came to be called the extrimists or radicals because they believed in adopting stronger measures to achieve their goals.

Hope it helps you...