In the Class X NCERT Science text, the escape velocity of a rocket is given as 8 km/second. But the correct answer is 11.2 km/s (Chapter: Universe). How should I handle this while answering for the examination? Will questions be asked on the information in the red boxes in Science and Social Science NCERT textbooks? I want to know the chapter-wise weightage of marks in science. (syllabus of Class X).

(Shashi Rekha)

The accepted correct value of escape velocity on earth is 11.2 km/s. As mentioned in the preface to the NCERT textbook, the matter in red border boxes in the book is non-evaluative. The chapter-wise weightage to different units of the syllabus is given in the document 'Secondary School Curriculum 2007, Volume I'. Please refer to the same.