Rights of children born from second marriage on father's property

Yes, you are entitle for share over the properties in the family. You can reopen the case subject to limitation. All children who are in the family entitle .equally. if the two wives are having children, the property is equally devide on them.

Under hindu law, as far as succession to property is concerned, there is no distinction between the rights born to children out of first or second wife. In your case, you acquired a right on the ancestral property by birth therefore you are eligible for a share in the property.