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प्रश्न
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.
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उत्तर
- Making sugar solution is a physical change.
- A physical change is generally reversible.
- Grinding of wheat grain changes its size. It is a physical change.
- Iron benches kept in lawns and gardens get rusted. It is a chemical change because a new substance is formed.
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
glowing of a bulb -
Write true or false
Rusting of iron is a chemical change.
True or false
Is melting of ice a reversible change?
Write true or false
A natural change can also be a desirable change.
State what is meant by the term – interconversion of matter. Is interconversion of matter a physical change or a chemical change.
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
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.
Give two examples for the following case:
Physical changes which are reversible
