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प्रश्न
Sublimation is classified as a physical change. Why ?
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उत्तर
Physical changes are those in which no new substance is formed. In sublimation there is direct conversion of solid into gas and vice versa. Thus the substance remains the same.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Making a fruit salad with raw fruits
State the differences between a physical change and a chemical change.
Match the columns.
| Column A | Column B |
| 1. a change which cannot be easily reversed | a. man-made change |
| 2 a change that repeats itself at regular intervals | b. chemical chang |
| 3. a change that is made by humans | c. physical change |
| 4. a change in which the original substance cannot be obtained | d. periodic change |
| 5. a change where no new substance is formed | e. irreversible change |
| f . slow change |
Classify the following as physical or chemical change :
Formation of curd from milk
Which of the following are physical changes and which are chemical changes ?
Classify the following as a physical or a chemical change.
Drying of wet clothes
Give four difference between physical and chemical changes.
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Natural and man-made change.
Tearing of sheet of paper into pieces is ______ By the process of Heating of water, change.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
