classify the following as physical and chemical changes and why so?
Condensation of steam
Glowing of an electric bulb
Respiration in living beings
Photosynthesis in plants
Beating gold into thin foil
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Condensation of steam is a physical change because H2O changes its state from liquid to solid.
Glowing of an electric bulb is a physical change because the tungsten filament in it becomes extremely hot and begins to glow (but no change in chemical composition occurs).
Respiration is a chemical change as oxidation (reaction with oxygen) occurs.
Photosynthesis in plants is a chemical change as a reaction between CO2 and water to give glucose and O2 occurs.
Beating gold into a thin foil is a physical change as only the shape and not the chemical composition of gold changes.
Glowing of an electric bulb is a physical change because the tungsten filament in it becomes extremely hot and begins to glow (but no change in chemical composition occurs).
Respiration is a chemical change as oxidation (reaction with oxygen) occurs.
Photosynthesis in plants is a chemical change as a reaction between CO2 and water to give glucose and O2 occurs.
Beating gold into a thin foil is a physical change as only the shape and not the chemical composition of gold changes.
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Condensation of steam is a physical change because H2O changes its state from liquid to solid.
Glowing of an electric bulb is a physical change because the tungsten filament in it becomes extremely hot and begins to glow (but no change in chemical composition occurs).
Respiration is a chemical change as oxidation (reaction with oxygen) occurs.
Photosynthesis in plants is a chemical change as a reaction between CO2 and water to give glucose and O2 occurs.
Beating gold into a thin foil is a physical change as only the shape and not the chemical composition of gold changes.
Glowing of an electric bulb is a physical change because the tungsten filament in it becomes extremely hot and begins to glow (but no change in chemical composition occurs).
Respiration is a chemical change as oxidation (reaction with oxygen) occurs.
Photosynthesis in plants is a chemical change as a reaction between CO2 and water to give glucose and O2 occurs.
Beating gold into a thin foil is a physical change as only the shape and not the chemical composition of gold changes.
Condensation of steam is a physical change because H2O changes its state from liquid to solid.
Glowing of an electric bulb is a physical change because the tungsten filament in it becomes extremely hot and begins to glow (but no change in chemical composition occurs).
Respiration is a chemical change as oxidation (reaction with oxygen) occurs.
Photosynthesis in plants is a chemical change as a reaction between CO2 and water to give glucose and O2 occurs.
Beating gold into a thin foil is a physic
Glowing of an electric bulb is a physical change because the tungsten filament in it becomes extremely hot and begins to glow (but no change in chemical composition occurs).
Respiration is a chemical change as oxidation (reaction with oxygen) occurs.
Photosynthesis in plants is a chemical change as a reaction between CO2 and water to give glucose and O2 occurs.
Beating gold into a thin foil is a physic
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