hi,

see it depends on the particular Institution, if the Institute offers admission on army children quota then you may apply with necessary documents. so first of all you have to select the Institute where you want to apply for admission. then check their rules and proceedings for admission. you would need below documents to apply for 11th  class admission:

class 10th pass certificate

class 10th marksheet

category certificate if applicable

transfer certificate from previous school

hope it would help.