I have bought a domain name, and now i want a free web host. can u suggest any?

I would not suggest a free web hosting this these are unreliable. A common complaint is of no support from the service provider. With nothing being paid on your part, why would one care for any of the troubles arising when you are literally in dire need of such care and concern. So you can't count on them, hence your hosting experience may become a nightmare especially when you are doing something important on your website which has attracted considerable amount of traffic too.