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प्रश्न
State whether the following is physical or chemical changes.
lightning —
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उत्तर
chemical change,
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Classify the following changes as physical or chemical:- melting of a solid (wax)
State whether the following is physical or chemical changes.
mixing oil with water —
Tick the most appropriate answer.
Photosynthesis requires
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 ?
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
______ is the substance that is dissolved in a solvent.
Which of the following is not a physical change?
