Look you can do solve your doubts from applications which provide solutions related to National eligibility and entrance test. However depending only on one application doesn't ensure your success in National eligibility and entrance test. I am mentioning below the name of the books which may help you and maybe are also very useful for you in preparation of national eligibility and entrance test:

• Objective concepts of Physics by HC Verma
• Neet objective Physics by DC Pandey
• Problems in general physics
• NCERT books of 11th and 12th
• Objective NCERT at your fingertips
• Organic chemistry
• Fundamentals of Physics
• Neet in 40 days by Arihant

Read more about NEET preparation by clicking on mentioned below link:

https://www.google.com/url?sa=t&source=web&rct=j&url=https://medicine.careers360.com/articles/neet-preparation-tips/amp&ved=2ahUKEwjRs4Dj0571AhXPa94KHRCfBAwQFnoECAQQAQ&usg=AOvVaw3Q_FrQnatyiG4s1cFLQZbR