भारत व बस्तर

Chapter 1 :   Basic Concepts of Chemistry   :- 1.  Calculate mass in grams of  a)  An atom of Sulphur.  b)  A molecule of H2O 2.  What is Molarity and Molality . Differences between them  ? 3.  What is law of multiple proportion ?  4.  Calculate the molecular formula of an oxide of Fe contain 69.9g and 30.1g of Fe and O respectively in percentage mass.  ( Molar mass of oxide = 159.8 g/mol and Fe = 55.85 ,   O = 16.00  ) 5.  What Will be mass of 01 Mole NaCl and  02 Mole of H²O.  6. Law of Definite Proportion. Chapter 2:  Structure of Atom : - 1.   What is dual nature of substance ?  Establish De-Broglie equation.  2.   What are four quantum numbers.  Explain.  3.  What is emissions Spectra ? Write the Postulate of Bohr's Atomic Model . 4.   What is Pauli's Exclusion Principle . Write it's two Application . 5.    Explain  Heisenberg  uncertainty Principle.  Chapter 3 :   Classification of Elements and Periodicity in Properties  :- 1.  Why Electron Affinity of Be and Mg is Ze