What is the right of widow in husbands share in property

There are two brothers A & B, A has x,y sons, B has a,b,c,d,e. x died before 1954. Partition taken place in 1954 among y,a,b,c,d,e keeping x wife under y protection. A schedule property given to y and so on. Now y son says there is no share to x wife because this is self acquire property of y,abcde. Hence share not given to x wife saying he left from home in his childhood and lived in neibour village. Importantly y got alloted double worth i.e. 10000 share through A schedule. remaining a,b,c,d,e got alloted 5000/- worth. x self acquired some properties included in 1954 document. y son filed case against x grand sons saying they do not have any right in A schedule property. y son has not provided any document of proof that properties acquired only by y,a,b,c,d,e except 1954 document. Please advise us whether x wife get 1/2 share of A schedule property. x grandchi