Imp points Dalton’s Atomic Theory: Every matter consists o | JEE NEET CORNER
Imp points Dalton’s Atomic Theory: Every matter consists of indivisible atoms. Atoms can neither be created nor destroyed. Atoms of a given element are identical in properties Atoms of different elements differ in properties. Atoms of different elements combine in a fixed ratio to form molecule of a compound.
Precision and Accuracy: Precision: Closeness of outcomes of different measurements taken for the same quantity. Accuracy: Agreement of experimental value to the true value
Laws of Chemical Combination: Law of conservation of mass: “For any chemical change total mass of active reactants are always equal to the mass of the product formed”
Law of constant proportions: “A chemical compound always contains same elements in definite proportion by mass and it does not depend on the source of compound”.
Law of multiple proportions: “When two elements combine to form two or more than two different compounds then the different masses of one element B which combine with fixed mass of the other element bear a simple ratio to one another”
Law of reciprocal proportion: “ If two elements B and C react with the same mass of a third element (A), the ratio in which they do so will be the same or simple multiple if B and C reacts with each other”.
Gay Lussac’s law of combining volumes: “At given temperature and pressure the volumes of all gaseous reactants and products bear a simple whole number ratio to each other
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