To be frank one should not completely depend in guide.Concentrate on book first and then if you have any doubts in that you can follow guide.
Maths:For maths follow your school regularly for writing.Whether you listen or not just write what the teacher wrote in th black board.Try to listen your maths class as far as possible.If you have any doubts in sums,you can watch any online youtube channels like Alex maths ,maths mythili etc……For maths kindly ignore guide
Physic:for physics also there are many you tube channels like Open your mind with MP Muruga
for physics you can actually use loyala guide.Concept wise answers are given there in that guide
Chemistry:for chemistry also there are many youtube channel alex maths channel contains chemistry also you can watch that .It will be really helpful in lock down days