Hello Lankada Vamsi. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

Disclaimer: Mock tests may or may not have answer keys.

Nevertheless, I would like to direct your attention to these links for some mock tests of JEE Mains:

• https://www.embibe.com/exams/free-jee-main-mock-test-series/
• https://engineering.careers360.com/articles/jee-main-mock-test

Also, please see here:

• https://www.onlinetestseries.in/allenkota/jee-main-exam/mock-test-papers-leader

Hope this helps you and all the best!