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प्रश्न
Select the chemical changes from the following list of changes
Change of seasons
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उत्तर
Change of season is a PHYSICAL change, only change in temperature is seen and is a reversible change.
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संबंधित प्रश्न
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
State whether the following is physical or chemical changes.
respiration in living beings —
Write true or false
Earthquake is a desirable change.
Fill in the blank.
The reaction in which energy is evolved is called
What will you take into account while identifying the following?
A chemical change in a substance.
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
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.
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.
Mention a few physical properties of a substance.
Mention some of the different conditions needed for chemical changes to occur.
