Am i entitled to my dead son's property? Am a hindu family widow.

First of all sorry to hear about your son. Yes, if your son has expired intestate i.e., without executing any will, then both you and your daughter-in-law become entitled to the properties of your son, in equal share.

However, if there is a will, then the bequeth shall be as per the will, if the will is validly executed, under the law.