SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Matter can be created, but not destroyed
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matter can be destroyed, but not created
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matter cannot be created or destroyed
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None of the above
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Detailed explanation-1: -Matter can change form through physical and chemical changes, but through any of these changes matter is conserved. The same amount of matter exists before and after the change-none is created or destroyed. This concept is called the Law of Conservation of Mass.
Detailed explanation-2: -The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants.
Detailed explanation-3: -According to the law, in an isolated system, matter cannot be created or destroyed-only changed. This means that the total mass of all substances before a chemical reaction will equal the total mass of all substances after a chemical reaction.
Detailed explanation-4: -A given compound always contains exactly the same proportion of elements by weight can be explained by the Law of Constant Proportion. Hence this is an incorrect statement about the Law of Conservation of Mass.