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Which of the following statements is true for a chemical change?
- a)It is easily reversible.
- b)No energy is absorbed or released
- c)It involves the formation of a new substance.
- d)It does not affect the chemical composition of the substance.
Correct answer is option 'C'. Can you explain this answer?
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Which of the following statements is true for a chemical change?a)It i...
Chemical changes cannot be reversed. New substances are formed in chemical changes. Chemical changes can be endothermic or exothermic. Chemical changes either absorb energy or release energy.
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Which of the following statements is true for a chemical change?a)It i...
Understanding Chemical Changes
When discussing chemical changes, it's essential to recognize their defining characteristics. Among the options provided, option 'C' is correct because it highlights a fundamental aspect of chemical changes.
Formation of New Substances
- New Substances Created: A chemical change involves a transformation that results in the formation of one or more new substances, which have different properties from the original materials.
- Examples: Common examples include rusting of iron, where iron combines with oxygen to form iron oxide, or the baking of a cake, where ingredients undergo a chemical change to create new compounds.
Why Other Options are Incorrect
- Easily Reversible:
- Chemical changes are usually not easily reversible. Unlike physical changes (like melting ice), reversing a chemical change often requires another chemical reaction.
- Energy Changes:
- Chemical changes typically involve energy changes, either absorbing or releasing energy in the form of heat, light, or sound.
- Affecting Chemical Composition:
- During a chemical change, the chemical composition of the substances involved is altered, leading to the creation of new chemical compounds.
Conclusion
In summary, option 'C' accurately captures the essence of a chemical change, emphasizing that it results in the formation of new substances with distinct properties. Recognizing these characteristics helps differentiate chemical changes from physical changes in everyday life.
When discussing chemical changes, it's essential to recognize their defining characteristics. Among the options provided, option 'C' is correct because it highlights a fundamental aspect of chemical changes.
Formation of New Substances
- New Substances Created: A chemical change involves a transformation that results in the formation of one or more new substances, which have different properties from the original materials.
- Examples: Common examples include rusting of iron, where iron combines with oxygen to form iron oxide, or the baking of a cake, where ingredients undergo a chemical change to create new compounds.
Why Other Options are Incorrect
- Easily Reversible:
- Chemical changes are usually not easily reversible. Unlike physical changes (like melting ice), reversing a chemical change often requires another chemical reaction.
- Energy Changes:
- Chemical changes typically involve energy changes, either absorbing or releasing energy in the form of heat, light, or sound.
- Affecting Chemical Composition:
- During a chemical change, the chemical composition of the substances involved is altered, leading to the creation of new chemical compounds.
Conclusion
In summary, option 'C' accurately captures the essence of a chemical change, emphasizing that it results in the formation of new substances with distinct properties. Recognizing these characteristics helps differentiate chemical changes from physical changes in everyday life.
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Which of the following statements is true for a chemical change?a)It is easily reversible.b)No energy is absorbed or releasedc)It involves the formation of a new substance.d)It does not affect the chemical composition of the substance.Correct answer is option 'C'. Can you explain this answer?
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