Absolutely. Just make sure your links point correctly.

you will need some method of identifying the secure or non-secure section of the site.
you could do a subdomain redirect [webmasterworld.com] or you could do it with a subdirectory.
if you use a subdomain there could be issues with which domain(s) works with the certificate.

We hv a ecommerce solution in the website for which we will be using the SSL Certificate

Incase if someone uses http:// instead of https:// , the pages should not appear

the pages should not appear?
as in a 404 response?
or should be redirected to the correct protocol?
as in a 301 response?

either way you need some way to distinguish between secure and non-secure parts of the site so you can redirect each to the other when necessary or give whatever response is appropriate.