Class 9 Chemistry Notes

Chemistry 9th Model Paper Half Book for Students Practice

Chemistry 9th      Objective Type Time Allowed:  15 minutes                                      Marks:  12 Note: You have four choices for each objective type question as A/B/C/ and D. The choice which you think is correct; fill that circle in front of that question number. Cutting or filling two or more circles will result in zero mark in …

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Model Paper 9th Class Chemistry

FINAL TERM EXAMINATION YEAR (Model Paper) CLASS: 9th            PAPER: Chemistry              DATE:__________         Student’s Name: _______________________________     Computer# Duty Tr:   Checked by:     Re-checked by: Q:1 Q:2 Q:3 Q:4 Q:5 Q:6 Q:7 Q:8 Q:9 PR Total 12 10 10 10 …

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Important Definitions – Class 9 Chemistry All Chapters Notes

Chemistry 9th              Important Definitions Chapter#1            Fundamentals Of Chemistry   Science: word science is derived from “scientia” means “knowledge”. The knowledge that provides understanding of this world and how it works is called science. The knowledge obtained through observations and experiments is called science. Chemistry: The branch of science that deal with the composition, structure, properties …

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Chapter 8 Chemical Reactivity – Class 9 Chemistry Notes

Chapter 8 Chemical Reactivity 9th Class Chemistry Question#1) Define metals? What are the different groups of metals? Answer: METALS Metals are the elements (except hydrogen) which are electropositive and form cations by losing electrons.   Classification of Metals: Metals can be categorized. Very reactive: Potassium, sodium, calcium, magnesium and aluminum. Moderately reactive :zinc, iron, tin …

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Chapter 7 Electrochemistry – 9th Class Chemistry Notes

Chapter 7 Electrochemistry – 9th Class Chemistry Notes   Question#1: Define electrochemistry? Also write a detailed note on oxidation reduction reactions? ELECTROCHEMISTRY: Electrochemistry is the branch of Chemistry that deals with the relationship between electricity and chemical reactions. OXIDATION AND REDUCTION REACTIONS ON THE BASIS OF ADDITION OR REMOVAL OF OXYGEN: Oxidation: Oxidation is defined as …

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Chapter 6 Solutions | 9th Class Chemistry Notes

Chapter 6 Solutions | 9th Class Chemistry Notes Question#1) Write a note on solution and its components?  Answer: SOLUTION:  A solution is a homogeneous mixture of two or more substances. Example, the air we breathe is a solution of several gases, brass is a solid solution of Zn and Cu. Sugar dissolved in water is an …

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Chapter 5 PHYSICAL STATES OF MATTER – 9th Class Chemistry

PHYSICAL STATES OF MATTER 9th Class Question#1) What is Matter? Write a note on different physical states of matter? Answer: Matter: Any thing that has mass and occupy space is called matter. Matter exists in three physical states. 1) Gas.  2) Liquid.  3) Solid. 1) Gas or Gaseous state: State of matter that has neither fixed …

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Chapter Number 4 STRUCTURE OF MOLECULE – 9th Class Chemistry Notes

Chapter Number 4 STRUCTURE OF MOLECULE – 9th Class Chemistry Notes   Question#1) Define atom? Why do atoms forms chemical bond (Formation of Molecule)? Atom: Smallest entity of an element that show all the properties of that element and can enter into a chemical reaction is called atom. WHY DO ATOMS FORM CHEMICAL BONDS? 0R …

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Chapter 3 Periodic Table – 9th Class Chemistry Notes

Chapter 3 Periodic Table 9th Class Chemistry Notes Question#1: Define Periodic table? What is the importance of periodic table? Answer: Periodic Table:- Periodic table is the arrangement of elements in order of increasing atomic number in such a way that those with similar properties are placed one above other in the form of a table. OR Periodic table …

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Chapter 2 STRUCTURE OF THE ATOM – Class 9 Chemistry Notes

Chapter 2 STRUCTURE OF THE ATOM – 9th Class Chemistry Notes   Q#1) What is atom? Write in short words about history of atoms? Answer: In 585 B.C, Ancient Greek philosopher Democritus suggested that matter is composed of tiny indivisible particles called atoms. The name ATOM was derived from the Latin word Atomos meaning indivisible. Daltons …

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Chapter 1 FUNDAMENTALS OF CHEMISTRY – 9th Class Chemistry Notes

Chapter 1 FUNDAMENTALS OF CHEMISTRY – 9th Class Chemistry Notes Question#1) Write a short note on history of chemistry? Answer:History of Chemistry: Chemistry derived its name from word alchemy, which is a European word derived from the Arabic word al-kimia. Alkemai is the old name of Egypt. The word alcheme, khame, kheme means black earth. …

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