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प्रश्न
Salt can be separated from its solution (salt dissolved in water), because ______.
विकल्प
mixing of salt in water is a change that can be reversed by heating and melting of salt.
mixing of salt in water is a change that cannot be reversed.
mixing of salt in water is a permanent change.
mixing of salt in water is a change that can be reversed by evaporation.
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उत्तर
Salt can be separated from its solution (salt dissolved in water), because mixing of salt in water is a change that can be reversed by evaporation.
Explanation:
Salt can be separated from water solution by evaporating the water. Hence, mixing of salt in water is a reversible change.
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संबंधित प्रश्न
Short Answer Type Question:
What is a physical change? Explain with example.
What is reversible change?
Formation of curd from milk is
Changes which cannot be reversed are called ______.
Differences between
reversible and irreversible changes are:
An iron ring is heated. Which of the following statement about it is incorrect?
A piece of iron is heated till it becomes red-hot. it then becomes soft and is beaten to a desired shape. What kind of changes are observed in this process-reversible or irreversible?
Can we reverse the following change? If yes, suggest the name of the method.
Curd into milk
Paheli mixed flour and water and
- made a dough,
- rolled the dough to make a chapati,
- baked the chapati on a pan,
- dried the chapati and ground it in a grinder to make powder.
Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.
Choose the odd one out. Give reason for your choice.
