No
When we look at Saturn from Earth we see mostly clouds of ammonia. We cannot see deep enough into them to see any liquid or solid parts so no, we have not seen any eruptions on Saturn. However we have seen some on Saturn's moons because they don't have such huge dense clouds themselves.
It is liquid methane.
Saturn is made out of hydrogen (75%) and helium (25%).
Saturn is a gas giant planet and does not have any terrestrial volcanoes like Earth. Its moon, Titan, however, is known to have cryovolcanoes that erupt liquid water, ammonia, or methane instead of molten rock.
Gas
No, the Saturn V rocket did not use solid fuel. It used liquid propellants in its first stage (RP-1 and liquid oxygen) and upper stages (liquid hydrogen and liquid oxygen).
It used liquid oxygen and liquid hydrogen.
no, there is no water on saturn. its either helium and hydrogen gas or frozen carbon dioxide
Probably not. Saturn is a gas giant planet, which means a very thick atmosphere above a surface which is entirely liquid. There may or may not be a solid core, but if there is it is deep below the surface.
are there any terrains on Saturn the planet ?
No. Saturn consists mostly of supercritical hydrogen and helium, in a state between liquid and gas.
Saturn and Jupiter