1 No early symptoms. 2  Blood in the urine - often intermittently. 3  Kidney area lump. 4  Abdominal swelling.  No pain - there is not usually any kidney pain unless the tumor is very advanced.
Gas content varies depending on what sort of material melted to form the magma. As a general rule, the most explosive eruptions come from magmas that have high gas levels and high viscosity, while the most subdued eruptions come from magmas with low gas levels and low viscosity.
The correct answer is a) Yes. In some cases, the amount of dissolved gasses and characteristics of the magma are such that no ash is produced. In these instances, magma with very low volatile content (dissolved water and gases) tends to erupt more quietly, producing little or no volcanic ash.