@ deepak
11th is the main class if u want to clear up the concept for the competetive exams , i could say , do less focus on the school exam and turn your attention more towards the entrance exam preparation .
for that do the following thing , these will also bhelp in school exams
1- read ncert twice
2- solve all the questions in the exericise and examples of ncert , they are vvimp .
3- take out ncert exempler book for maths and phy only , and solve the ques from their .
4- follow 1 ref book for each subject except ncert , donot follow more , that will intermix your concep between that .
BOOKS TO FOLLOW IN CLASS 11TH
MATHS
1- MATHS BY M L KHANNA
2- MATHS BY R S AGARWAL (SCHOOL LEVEL )
PHYSICS
1- CONCEPT OF PHY BY H C VERMA
2- SIMPLIFIED PHYSICS BY SL ARORA
3- ARIHANT ALL IN ONE PHYSICS
CHEMISTRY
1- ORGANIC BY RANJEET SHAHI
2- INORGANIC BY O.P TANDON
3- PHYSICAL BY P BAHADUR
BIOLOGY (IF U HAVE )
1- TRUEMANS ELEMENTARY BIOLOGY
2- ARIHANT ALL IN ONE BIOLOGY
3- OBJ BIOLOGY BY GRB PUBLICATION
HOPE IT CLEARS THE DOUBT
ALL THE BEST ..