Does the 1st wife receive full benefits from a life insurance policy even if they are divorced?

The circumstances can vary greatly here. It will depend on what the conditions of alimony are, for one. If the ex-husband isn't required to keep the ex-wife as a beneficiary on a life insurance policy, and decides to remove the ex-wife, then the ex-wife will receive nothing.
The circumstances can vary greatly here. It will depend on what the conditions of alimony are, for one. If the ex-husband isn't required to keep the ex-wife as a beneficiary on a life insurance policy, and decides to remove the ex-wife, then the ex-wife will receive nothing.