Dear IIT JEE is very accurate in this . You will not find any question which is not included in the syllabus.
and also they will not left any topic of the issued syllabus.atleast u will find one question from every topic.
if you will see the pattern of last year papers,then you will find that question were framed in such a way that it include
more than one chaptre. and in whole paper almost entire syllabus are covered
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