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SOME BASIC CONCEPTS OF CHEMISTRY, STD -11TH TOPIC NUMBER -1, BY – MRS LAD V.R.
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INTRODUCTION
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CHEMISTRY IS CENTRAL SCIENCE
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NATURE OF CHEMISTRY CHEMISTRY IS CLASSIFIED AS, CLASSIFICATION
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MATTERCLASSIFICATION ON THE BASIS OF CHEMICAL COMPOSITION
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METAL
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NON METAL
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COMPOUNDS, COMPOUNDS ARE SUBSTANCES WHICH CAN BE BROKEN DOWN IN TO SIMPLER SUBSTANCES BY ORDINARY CHEMICAL CHANGES., IN COMPOUND TWO OR THREE ELEMENTS ARE COMBINED., MIXTURE CONTAINS TWO OR MORE SUBSTANCES IN NO FIXED PROPORTION., MIXTURE ARE FURTHER DIVIDED AS,
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STATES OF MATTER
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PROPERTIES OF MATTER AND THEIR MEASUREMENT, BURNING OF MAGNESIUM
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MEASUREMENT OF PROPERTIES
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S I FUNDAMENTAL UNITS
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PHYSICAL PROPERTIES
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VOLUME, VOLUME : IT IS THE AMOUNT OF SPACE OCCUPIED BY THREE DIMENSIONAL OBJECT
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DENSITY
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TEMPERATURE
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LAWS OF CHEMICAL COMBINATION, LAW OF CONSERVATION OF MASS: IT STATES THAT MASS NEITHER BE CREATED NOR BE DESTROYED.
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LAW OF DEFINITE PROPORTION, A GIVEN COMPOUND ALWAYS CONTAINS EXACTLY THE SAME PROPORTION OF ELEMENTS BY WEIGHT. IRRESPECTIVE OF SOURCES A GIVEN COMPUND ALWAYS CONTAINS THE SAME ELEMENT IN THE SAME PROPORTION
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Law of multiple proportion
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GAY LUSSAC LAW OF GASEOUS VOLUME
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AVOGADRO’S LAW
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AVOGADRO’S LAW
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DALTON’S ATOMIC THEORY
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ATOMIC MASS
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AVERAGE ATOMIC MASS
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Molecular mass
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Molecular mass
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PROBLEM ON MOLECULAR MASS
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FORMULA MASS
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FORMULA MASS OF SUBSTANCE IS THE SUM OF ATOMIC MASSES OF THE ATOMS PRESENT IN THE FORMULA
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MOLE CONCEPT
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MOLE
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MOLE
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MOLAR MASS
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MOLE AND GASES
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MOLE AND GASES
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MOLE AND GASES
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IUPAC HAS RECENTALLY CHANGED THE STANDARD PRESSURE TO 1 bar .UNDER THESE NEW STP CONDITIONS THE MOLAR VOLUME OF GAS IS 22.71 L/mol, ONE MOLE OF ANY GAS OCCUPIES SAME VOLUME
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MOLE