Can we add more than 1 form on facebook?

Yes I think this is possible. There are different ways to integrate forms to facebook. You can check out the links below.

https://www.jotform.com/help/82-Adding-a-form-to-Facebook-Custom-iFrame-App- - using iFrame APP

https://www.jotform.com/help/123-Adding-a-form-to-Facebook-Facebook-Developer-Method- - Developer Method

https://www.jotform.com/help/278-How-to-Integrate-Your-Form-with-Facebook-Fit-Forms-