Metallurgy is not that important chapter for neet . It is a chapter that should be dealt with in the end. 

only 1-2 questions can be expected from this chapter in the exam 

all the best! 

Dear Nusarat,

There is no fix number of question from metallurgy. Maximum 5-6 questions can be asked. Most of them are direct line from NCERT. So read NCERT carefully and follow MCQs from standard book. Prepare well for exam. All the best !

You can get 2-3 questions from metallurgy. But don't concentrate seperately. Revise all tge topics from NCERT books. You can score well. All the best :)