In short, no.
there is never really a wrong hypothesis because its basically just a guess....
Yes, a hypothesis is testable. In fact, a hypothesis is formulated for that very reason; to be tested.
If you have a theory of some type (hypothesis), and you can design an experiment to test its validity, then it would be a testable hypothesis.
A testable hypothesis is one which you can formulate an experiment around. In simpler terms, a testable hypothesis is one you can test to see if it is true or not.
Peter Ward on The Medea Hypothesis
Ecosystem Life and the Gaia Hypothesis
Dangerous Scientific Misconceptions
The Politicization of the Federal Reserve