Let (X,μ) be a 1-connected
H-space such that H∗(ΩX;Qp) is torsion free. We study the torsion in H∗(X;Qp) as
well as its algebra structure. In particular we characterize lack of torsion in
H∗(ΩX;Qp) in terms of the module of indecomposables Q(H∗(X;Qp)). We also
study the Steenrod module structure of Q(H∗(X;Zp)).