NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry
NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry Topics and Subtopics in NCERT Solutions for Class 11 Chemistry Chapter 1 Some basic Concepts of Chemistry : Section Name Topic Name 1 Some Basic Concepts of Chemistry 1.1 Importance of Chemistry 1.2 Nature of Matter 1.3 Properties of Matter and their Measurement 1.4 Uncertainty in Measurement 1.5 Laws of Chemical Combinations 1.6 Dalton’s Atomic Theory 1.7 Atomic and Molecular Masses 1.8 Mole Concept and Molar Masses 1.9 Percentage Composition 1.10 Stoichiometry and Stoichiometric Calculations NCERT TEXTBOOK QUESTIONS SOLVED Question 1. Calculate the molecular mass of the following: (i) H 2 0 (ii) C0 2 (iii) CH 4 Answer: (i) Molecular mass of H 2 O = 2(1.008 amu) + 16.00 amu=18.016 amu (ii) Molecular mass of CO 2 = 12.01 amu + 2 x 16.00 amu = 44.01 amu (iii) Molecular mass of CH 4 = 12.01 amu + 4 (1.008 amu) = 16.042 amu Question 2. Calculate the mass percent of different elements present in so...