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प्रश्न
Fill in the blank.
There is no change in the _____________of the substance during a physical change.
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उत्तर
There is no change in the composition of the substance during a physical change.
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संबंधित प्रश्न
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
State three differences between evaporation and boiling
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
A physical change is temporary. Explain.
State the Differences Between a Physical Change and a Chemical Change.
Two chemical substances X and Y combine together to form a product P which contains both X and Y X + Y P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning X, Y and P are correct ?
- P is a compound
- X and Y are compounds
- X and Y are elements
- P has a fixed composition
Which of the following are physical changes and which are chemical changes ?
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
Distinguish physical and chemical changes.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
