Here are some of the youtube challenge for class 11 chemistry as well as jee preparation:

Physics wallah alakh pandey is one of the famous you Tuber for teaching chemistry class 11 for JEE/NEET.

Sikhsha house-3D animated videos in English.

Gravity circle for JEE.

Vedantu JEE.

Vedantu NEET made EJEE best teacher arvind Arora for chemistry.

Edumantra is one of the best teacher for JEE/NEET.

Best chemistry books for JEE Preparation are:

Organic chemistry by OP Tandon.

Physical chemistry by OP Tandon.

Concise inorganic chemistry by J D Lee.