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प्रश्न
Which of the following are physical changes and which are chemical changes ?
विकल्प
Physical change
Chemical change
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उत्तर
Burning of magnesium wire – Chemical change
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संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
Write short answer.
Name two reversible changes.
Name a chemical change which takes place in presence of:
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
True or false
Change of seasons is a non-periodic change.
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
Select the chemical changes from the following list of changes
Vaporisation of water into water vapour.
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
Iron pipes coated with zinc do not get rusted easily.
