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Which one of the following is not a chemical change?
- a)Burning of coal in air
- b)Fermentation of sugar cane juice
- c)Crystallization of table salt from sea water
- d)Cracking of petroleum
Correct answer is option 'C'. Can you explain this answer?
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Which one of the following is not a chemical change?a)Burning of coal ...
A chemical change a new substance is formed. During crystallization of table salt from sea water no new substance is formed hence, it is not a chemical change.
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Which one of the following is not a chemical change?a)Burning of coal ...
Crystallization of table salt from sea water is not a chemical change
Crystallization of table salt from sea water is a physical change rather than a chemical change. Let's break down the reasons why this process does not involve a chemical change:
- Definition of a chemical change: A chemical change results in the formation of new substances with different chemical properties. This usually involves the breaking and forming of chemical bonds.
- Crystallization of table salt: When table salt (sodium chloride) is crystallized from sea water, it involves the physical process of separating the salt from the water through evaporation. The salt molecules remain the same throughout this process.
- No new substances formed: During crystallization, the chemical composition of salt remains unchanged. The salt molecules simply reorganize into a crystal lattice structure as the water evaporates.
- Physical change: Crystallization is considered a physical change because it does not involve any chemical reactions or the formation of new substances. It is a reversible process where the salt can be dissolved back into water.
In contrast, processes like burning of coal, fermentation of sugar cane juice, and cracking of petroleum involve chemical reactions that lead to the formation of new substances with different properties. These processes are examples of chemical changes.
Crystallization of table salt from sea water is a physical change rather than a chemical change. Let's break down the reasons why this process does not involve a chemical change:
- Definition of a chemical change: A chemical change results in the formation of new substances with different chemical properties. This usually involves the breaking and forming of chemical bonds.
- Crystallization of table salt: When table salt (sodium chloride) is crystallized from sea water, it involves the physical process of separating the salt from the water through evaporation. The salt molecules remain the same throughout this process.
- No new substances formed: During crystallization, the chemical composition of salt remains unchanged. The salt molecules simply reorganize into a crystal lattice structure as the water evaporates.
- Physical change: Crystallization is considered a physical change because it does not involve any chemical reactions or the formation of new substances. It is a reversible process where the salt can be dissolved back into water.
In contrast, processes like burning of coal, fermentation of sugar cane juice, and cracking of petroleum involve chemical reactions that lead to the formation of new substances with different properties. These processes are examples of chemical changes.
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Which one of the following is not a chemical change?a)Burning of coal in airb)Fermentation of sugar cane juicec)Crystallization of table salt from sea waterd)Cracking of petroleumCorrect answer is option 'C'. Can you explain this answer?
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Which one of the following is not a chemical change?a)Burning of coal in airb)Fermentation of sugar cane juicec)Crystallization of table salt from sea waterd)Cracking of petroleumCorrect answer is option 'C'. Can you explain this answer? for Defence 2024 is part of Defence preparation. The Question and answers have been prepared according to the Defence exam syllabus. Information about Which one of the following is not a chemical change?a)Burning of coal in airb)Fermentation of sugar cane juicec)Crystallization of table salt from sea waterd)Cracking of petroleumCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Defence 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following is not a chemical change?a)Burning of coal in airb)Fermentation of sugar cane juicec)Crystallization of table salt from sea waterd)Cracking of petroleumCorrect answer is option 'C'. Can you explain this answer?.
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