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 - Dr.Sanjaykumar Pawar  NCERT Class 11 Chemistry Chapter 3 – Classification of Elements and Periodicity in Properties  Complete NCERT Class 11 Chemistry Chapter 3 solutions covering the periodic table, classification of elements and periodic trends in properties. Complete NCERT Exercise Solutions (3.1–3.30) These solutions are prepared according to the CBSE Class 11 Chemistry examination pattern. Each answer includes scientific reasoning, important concepts, formulas and step-by-step explanations. Subject: Chemistry Class: 11th Chapter: 3 Topic: Periodic Classification of Elements Quick Navigation Basic Concepts of Periodic Classification Quantum Numbers and Periodic Table Atomic and Ionic Radii Ionization Enthalpy Electron Gain Enthalpy Electronegativity Metallic and Non-metallic Character Blocks of the Periodic Table Section 1: Basic Concepts of Periodic Classification Question 3.1: What is the basic theme of organisation in the pe...

 -Dr.Sanjaykumar Pawar  CBSE Class 11 Chemistry – Chapter 1  Complete NCERT Class 11 Chemistry Chapter 1 exercise solutions , covering significant figures, limiting reagents, stoichiometry, mole concept and chemical calculations. Some Basic Concepts of Chemistry NCERT Exercise Questions and Solutions (1.1–1.19) Answer Writing Format: All solutions are presented in a systematic CBSE Board examination format, including formulas, substitutions, calculations and final answers with appropriate units. Question 1.1 – Calculate the Molar Mass Calculate the molar mass of the following: (i) H 2 O (ii) CO 2 (iii) CH 4 Solution: (i) Water (H 2 O) Atomic masses: H = 1.008 g mol -1 O = 16.00 g mol -1 Molar mass of H₂O = 2(1.008) + 16.00 = 18.016 g mol⁻¹ (ii) Carbon dioxide (CO 2 ) Molar mass of CO₂ = 12.01 + 2(16.00) = 44.01 g mol⁻¹ (iii) Methane (CH 4 ) Molar mass of CH₄ = 12.01 + 4(1.008) = 16.042 g mol⁻¹ Final Answers: (i) H₂O = 18.016 g...