Hi Yogi,
I agree with sonir. I appreciate the act of adopting a kid and welcome her to join your family. Now, Lets come to the fact.
1) I dont know much about the application form in India. What you can do is look in the form and see if there is any question that asks about adoption.
2) Another point to note is, By the time you have applied for PR the kid is already your daughter legally.
Now, If there is no place in the form that says "did you adopt any kid", I say you are absolutely fine. As far as, I remember there is no such question in the form. Please double check. If there is any such, I would contact a lawyer immediately.
Both cases, you are still fine because of the 2nd point I mentioned above.
Thanks,
satya.