Hey,

Yes you can participate in second round of counselling if you have not been allotted any seat in first round of counselling. The rules for second round of counselling are that, if you get a seat in 2nd round and you choose to join it, then you cannot leave the seat. Suppose you choose to not join the college allotted in second round and exit the counselling then there will be forfeiture of the deposit money as second round does not have free exit.