Hi,I have bought BTC at virwox but I think I can't trade it there.It is still in my virwox account.So can I sell these BTC's at exchanges like btc-e or coinbase?
Yep you can send it to BTCE, Bitstamp or any other exchange and sell it there. Make sure you read about verification requirement of exchange before start trading there.
Also you can always buy or sell bitcoins on
https://buysellbitco.in/ Regards