Class 9 Exam > Class 9 Questions > Which of the following statement is correct?a...
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Which of the following statement is correct?
- a)Both burning of a paper and cooking of food are examples of a physical change
- b)Both burning of wood and cooking of food are are examples of a chemical change.
- c)Burning of a paper is a physical change and cooking of food is a chemical change.
- d)Burning of a paper is chemical change and cooking of food is a physical change.
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Which of the following statement is correct?a)Both burning of a paper ...
Examples of Chemical Changes
A new compound (product) results from a chemical change as the atoms rearrange themselves to form new chemical bonds.
A new compound (product) results from a chemical change as the atoms rearrange themselves to form new chemical bonds.
- Burning wood
- Souring milk
- Mixing acid and base
- Digesting food
- Cooking an egg
- Heating sugar to form caramel
- Baking a cake
- Rusting of iron
Most Upvoted Answer
Which of the following statement is correct?a)Both burning of a paper ...
Burning of wood and cooking of food are examples of chemical change because they are irreversible
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Which of the following statement is correct?a)Both burning of a paper ...
Explanation:
Chemical Change:
A chemical change is a process in which one or more substances are transformed into new substances with different properties. During a chemical change, the composition and chemical properties of the substances involved are altered. Examples of chemical changes include burning, rusting, and digestion.
Physical Change:
A physical change is a change in which the substance undergoes a change in its physical properties but does not change its chemical composition. In a physical change, the molecules or atoms of the substance remain the same. Examples of physical changes include melting, boiling, and cutting.
Analysis of options:
a) Both burning of a paper and cooking of food are examples of a physical change.
- This statement is incorrect because burning of a paper is a chemical change, not a physical change.
b) Both burning of wood and cooking of food are examples of a chemical change.
- This statement is correct. Both burning of wood and cooking of food involve chemical reactions that result in the formation of new substances with different properties.
c) Burning of a paper is a physical change and cooking of food is a chemical change.
- This statement is incorrect. Burning of a paper is a chemical change, not a physical change.
d) Burning of a paper is a chemical change and cooking of food is a physical change.
- This statement is incorrect. Burning of a paper is a chemical change, not a physical change.
Conclusion:
The correct statement is option B - Both burning of wood and cooking of food are examples of a chemical change. Burning of wood involves the combustion of cellulose present in the wood, resulting in the release of heat and the formation of carbon dioxide and water vapor. Cooking of food involves various chemical reactions such as denaturation of proteins, caramelization of sugars, and Maillard reactions, which result in the transformation of raw ingredients into cooked food with different flavors and textures.
Chemical Change:
A chemical change is a process in which one or more substances are transformed into new substances with different properties. During a chemical change, the composition and chemical properties of the substances involved are altered. Examples of chemical changes include burning, rusting, and digestion.
Physical Change:
A physical change is a change in which the substance undergoes a change in its physical properties but does not change its chemical composition. In a physical change, the molecules or atoms of the substance remain the same. Examples of physical changes include melting, boiling, and cutting.
Analysis of options:
a) Both burning of a paper and cooking of food are examples of a physical change.
- This statement is incorrect because burning of a paper is a chemical change, not a physical change.
b) Both burning of wood and cooking of food are examples of a chemical change.
- This statement is correct. Both burning of wood and cooking of food involve chemical reactions that result in the formation of new substances with different properties.
c) Burning of a paper is a physical change and cooking of food is a chemical change.
- This statement is incorrect. Burning of a paper is a chemical change, not a physical change.
d) Burning of a paper is a chemical change and cooking of food is a physical change.
- This statement is incorrect. Burning of a paper is a chemical change, not a physical change.
Conclusion:
The correct statement is option B - Both burning of wood and cooking of food are examples of a chemical change. Burning of wood involves the combustion of cellulose present in the wood, resulting in the release of heat and the formation of carbon dioxide and water vapor. Cooking of food involves various chemical reactions such as denaturation of proteins, caramelization of sugars, and Maillard reactions, which result in the transformation of raw ingredients into cooked food with different flavors and textures.
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Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer?
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Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer?.
Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer? for Class 9 2024 is part of Class 9 preparation. The Question and answers have been prepared according to the Class 9 exam syllabus. Information about Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Class 9 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer?.
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Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which of the following statement is correct?a)Both burning of a paper and cooking of food are examples of a physical changeb)Both burning of wood and cooking of food are are examples of a chemical change.c)Burning of a paper is a physical change and cooking of food is a chemical change.d)Burning of a paper is chemical change and cooking of food is a physical change.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice Class 9 tests.
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