What is the basicity of H2SO5 ? Explain Share with your friends Share 0 Abhishek Dwivedi answered this Dear student.. Basicity of H2SO5 IS 1..Because of Bascity is check on the basis that how many no. Of OH group the compound contain. In Caro's acid(H2SO5) contain 1 OH gp...REGARDS -2 View Full Answer