fundamentals of chemistry

Identifying Examples of different branches of Chemistry | Class 9 Chemistry Chapter 1 Notes

Identifying examples of different branches of chemistry class 9 chemistry chapter 1 notes: 1. Photosynthesis produces glucose and oxygen from CO2 and H2O in the presence of chlorophyll and sunlight. 2. Plantation helps in overcoming the Greenhouse effect. 3. Haber’s process converts large quantities of hydrogen and nitrogen into ammonia.  4. Ammonia is a colourless …

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Chemistry definition and its branches Notes | Class 9 Chemistry Chapter 1

Class 9 Chemistry Chapter 1 Fundamentals of Chemistry Notes : Topics covered: Science Chemistry Applications of chemistry Matter Physical states of matter Branches of chemistry —————————- Science Chemistry Click to Watch -> What is Chemistry ( in Urdu) —————————- Applications of Chemistry: Matter —————————- Physical States of Matter What are the major branches of chemistry? …

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How to find Excess and Limiting reactants |Reagents | Chemistry

Do you know! You can easily find excess and limiting reactants Firstly, you must know that !! What is Limiting reactant and excess reactant? Limiting Reactant Definition: The reactant which is used up completely and earlier in a chemical reaction is called a limiting reactant. Limiting reactant is also known as limiting reagent . Excess …

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How to Calculate Molecular mass of a Compound

As mass of an element is the atomic mass similarly mass of molecule is called molecular mass of a compound. What is Molecular mass ? Molecular mass is defined as “ the sum of atomic masses of all the atoms present in the molecule “ . To find the molecular mass of a compound ,we …

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Class 9 Chemistry Fundamentals of Chemistry Important Q/A for Exams

Class 9 Chemistry Fundamentals of Chemistry Important Q/A for Exams: Chemistry branch of science which deals with Composition of matter Properties of matter Changes in matters Different laws and principles which deals with these changes Internal Structure Matter  Anything in the universe which occupy space (having volume) and has mass is called matter. Matters can …

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Avogadro’s Number and Mole – How is Mole Calculated

Mole is a counting device or a number like: 12 things   =  Dozen 144 things  =  Gross 2 things = Pair 1000 g    =   1k g similarly: 6.022 x 1023 particles =1 mole Mole Definition: In Chemistry , mole is defined as the amount of substance that exactly contains 6.022 x 1023 particles. . For …

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Important mcqs Class 11 Chemistry with Answers Chapter wise

Chapter-Wise multiple Choice Question with brief answers for Class 11 Chemistry: Chapter 1: Basic Concepts of Chemistry Important MCQs Chapter 2 :Structure of Atom Important MCQs (Part 1) Chapter 2 :Structure of Atom Important MCQs (Part 2) Chapter 3 Chemical Bonding Important MCQs (Part 1) Chapter 3 : Chemical Bonding MCQS ( Part 2) More …

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Types of Substances – Elements and Compounds Properties and Types

Substances: A sample of pure matter is called a substance or anything whose composition is uniform throughout and has well-defined physical and chemical properties is called a substance. E.g. Silver, Gold, Water, NaCl, etc. Types of Substances: They are of two types: i) Elements         ii) Compound Element  That pure substance that can’t …

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Difference between Formula unit and Formula mass

What is Formula unit? In Chemistry, the simplest ratio between cations & anions in an ionic compound is called formula unit. OR: Simplest unit whose repetition builds crystal is called formula unit. Usually for ionic compounds their empirical formula is their formula unit while for covalent compound their molecular formula is their formula unit. For …

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