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).
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.