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प्रश्न
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
विकल्प
released
absorbed
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उत्तर
The energy required for completion of a physical change is released when the change is reversed.
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संबंधित प्रश्न
Fill in the blank.
Changes that occur in nature are called ........................
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
Classify the following as physical or chemical change :
Formation of curd from milk
The rusting of an iron object is called :
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Name the following.
A form of energy required for a chemical change.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
Fill in the blanks in the following statements using the words given in the box.
| rusted, colourful, substance, chemical, physical, reversible, iron oxide, object |
- Making sugar solution is a ______ change.
- A physical change is generally ______.
- Grinding of wheat grain changes its size. It is a ______ change.
- Iron benches kept in lawns and gardens get ______. It is a ______ change because a new ______ is formed.
Give two examples for the following case:
Physical changes which are reversible
