Chemistry Class 9 Chapter 6 Important Questions Answers 2023 Chemistry Class 9 Chapter 6 ( Solutions ) Important Question/Answers QUESTION.1 Define the terms: A. Solution B. Aqueous solution C. Solute D. Solvent Answer Solution A homogenous mixture of two or more components with particles smaller than one nm is referred to as a solution. Solutions …
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Chemistry Class 9 Chapter 4 Important Question Answers 2023 9th Chemistry Chapter 4 Structure of Molecules Q.1 Why do atoms react? Answer Atoms react with each other to attain stability. All the atoms except those of noble gases are unstable because their valence shell is incomplete. So, atoms react with each other by loss, gain, …
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Chemistry Class 9 Chapter 3 Important Question Answers 9th Class Chemistry Periodic Table and Periodicity of Properties Q: How do you find the Group number of the periodic table elements? Trick to find Periodic Table Elements Group number Group Number = Number of valence electron Q: What is the electron arrangement of an element with …
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What is a simple definition of Chemistry. Also briefly explain branches of chemistry. Chemistry Definition Branch of science that deals with the study of matter, changes in matter, and the laws and principles that govern these changes Explanation The origin of the term chemistry is the word KEEM. The same name was given to ancient …
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Fundamentals of Chemistry pdf Notes Class 9 Chemistry Chapter 1 Learning Objective Chemistry Introduction Branches of Chemistry ->Physical Chemistry->Organic Chemistry->Inorganic Chemistry->Biochemistry->Industrial Chemistry->Nuclear Chemistry->Environmental Chemistry->Analytical Chemistry Basic Definitions Elements, Compounds and Mixtures Atomic Number, Mass Number Relative Atomic Mass and Atomic Mass Unit Empirical Formula, Molecular Formula Molecular Mass and Formula Mass Chemical Species Ions (Cations, …
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Fundamentals of Chemistry Notes 2023 What exactly is science? Science is the systematic body of knowledge gathered via observations and experimentation. Explanation Our five senses acquire information about the material cosmos, which forms knowledge. When the authenticity and veracity of facts are proved through experiments, however, this is referred to as science. Example: Water freezes …
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Chemistry Class 9 Chapter 1 mcqs Federal Board Fundamentals of Chemistry Important MCQs FBISE 9th Class MCQs 1. There are———–known elements. A. 101 B. 109 C. 118 D. 126 ANSWER.C 2. Atoms or groups of atoms with unpaired electrons are known ……….. A.compounds B.mixture C.molecules D.free radicals ANSWER.D Continue Reading Free radicals 3. A gas contains ————-molecules …
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Discovery of Neutron: Rutherford, in 1920, predicted about neutron but it was discovered by James Chadwick in 1932. He performed an experiment. How the neutron was discovered? James Chadwick bombarded beryllium with α-particles and found that highly penetrating radiations were emitted from beryllium, which in turn have knocked out protons from paraffin target. By …
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Yield of a reaction: The quantity of product produced in a reaction is called the yield of the reaction. Types of Yield of a reaction yield of the reaction is of three types. (i) Theoretical Yield: The quantity of product as calculated by stoichiometric calculations or calculations based on a balanced equation is called theoretical …
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