GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Physical Property
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Chemical Property
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Either A or B
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None of the above
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Detailed explanation-1: -Physical changes involve changes in the form of a substance, but not its chemical composition. As we burn paper, it changes into ash i.e., changes its chemical composition. Hence, it is a chemical change not a physical one.
Detailed explanation-2: -Burning of paper is a chemical change because as a result of burning, ash is formed as a new chemical substance. During burning, Carbon react with hydrogen and oxygen, turning them into Carbon dioxide ( CO 2 ) and water. These changes are irreversible and ash can not be converted back to the original substance.
Detailed explanation-3: -Burning is a chemical change. This is because, new substances (e.g. ash and carbon dioxide CO2) are formed during burning.
Detailed explanation-4: -The process of burning (as opposed to evaporating) is a chemical reaction, a chemical change.
Detailed explanation-5: -The most common chemical properties are flammability and reactivity. Flammability looks very similar to a word that many of you have seen before: flame. In this case, flammability is the ability of a substance to burn or better yet, how easily something burns.