Will i face a problem in getting a good placement as i didn't score well in 12th despite being a topper in my college?

Most of the company now a days asking 10h ,12th and eng throughout 60%.so it may be problem for you but try to hide your past with hardwork in btech.

Dear Alankriti Jo beet gai so baat gai, look forward , work hard. For a bright future +12 is not a only criteria , there are many other criteria for getting success.concentrate on your present study. good luck