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प्रश्न
Select the chemical changes from the following list of changes
Respiration in mammals.
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उत्तर
Respiration in mammals is a CHEMICAL change, we breathe in oxygen and breathe out carbon dioxide. It is irreversible and composition changes.
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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.
Fill in the blank.
A new substance is formed in a ............... change.
Write true or false for the statement.
Dissolving of solute in a solvent and rusting of iron are both physical changes.
State four differences between physical and chemical changes.
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
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
Stretching gold coin into a ring is a ______ change.
Assertion: Burning of wood log to charcoal is a physical change.
Reason: The products formed of burning a piece of wood can be easily converted back to wood log.
Grinding of wheat grain changes its size. It is a ____________ change.
