Yes there are online classes available for NCHM JEE 2020 preparation. The classes are provided on multiple platforms. You can refer to youtube channel in case you want to access free videos. However in order to be familiar and pro in preparation, you need to solve mock tests and sample papers whose links are attached below:

https://hospitality.careers360.com/articles/nchmct-jee-mock-test

https://hospitality.careers360.com/articles/nchmct-jee-sample-papers

Hello Jaya !

You can try following platforms :

1. IMS Institute Online Course
2. Hitbullseye NCHM online coaching
3. NCHMCT JEE at Rana Education

These are some platforms which provide online coaching for NCHM JEE , you can try any of the above by seeing which program suits you the best.

Hope it helps !