  Using methods based on conformal field theory, we construct model wave
functions on a torus with arbitrary flat metric for all chiral states in the
abelian quantum Hall hierarchy. These functions have no variational parameters,
and they transform under the modular group in the same way as the
multicomponent generalizations of the Laughlin wave functions. Assuming the
absence of Berry phases upon adiabatic variations of the modular parameter
$\tau$, we calculate the quantum Hall viscosity and find it to be in agreement
with the formula, given by Read, which relates the viscosity to the average
orbital spin of the electrons. For the filling factor $\nu=2/5$ Jain state,
which is at the second level in the hierarchy, we compare our model wave
function with the numerically obtained ground state of the Coulomb interaction
Hamiltonian in the lowest Landau level, and find very good agreement in a large
region of the complex $\tau$-plane. For the same example, we also numerically
compute the Hall viscosity and find good agreement with the analytical result
for both the model wave function and the numerically obtained Coulomb wave
function. We argue that this supports the notion of a generalized plasma
analogy that would ensure that wave functions obtained using the conformal
field theory methods do not acquire Berry phases upon adiabatic evolution.
