Hello,
There are 45 questions each in physics and chemistry and 90 questions in biology.
The chapter wise weight age is calculated based on previous year trends.
Each and every chapter weight age is given in the site below. You can check this link:
https://medicine-careers360-com.cdn.ampproject.org/v/s/medicine.careers360.com/articles/neet-chapter-wise-weightage-and-important-topics/amp?amp_js_v=a2&amp_gsa=1&usqp=mq331AQCKAE%3D#aoh=15814453100258&referrer=https%3A%2F%2Fwww.google.com&amp_tf=From%20%251%24s&ampshare=https%3A%2F%2Fmedicine.careers360.com%2Farticles%2Fneet-chapter-wise-weightage-and-important-topics
Hope this helps.
All the best.

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