These free NCERT-based resources are just as good (and legally free):

from the Class 9 syllabus? Create a practice quiz based on a specific chapter?

is a highly regarded reference book designed to supplement the NCERT syllabus for CBSE students. It is valued for its simple language and comprehensive coverage of both board exams and competitive tests like NTSE. Amazon.com Key Features

And drop “Modern ABC Class 9 Chemistry PDF” unless you’re specifically analyzing that textbook’s content.

: Offers the Modern's ABC Plus of Science (Chemistry) Class 9 for convenient home delivery.