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प्रश्न
Name the following.
The gaseous product of the chemical change which takes place during respiration in living organisms.
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उत्तर
CO2 carbon dioxide.
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संबंधित प्रश्न
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
State whether the following is physical or chemical changes.
shaping a piece of glass —
State whether the following is physical or chemical changes.
lightning —
Sublimation is classified as a physical change. Why ?
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Periodic and non-periodic change
Explain the term – ‘sublimation’. Is sublimation of naphthalene – a physical or a chemical change. Give reasons.
In a solution of salt in water, water is the solute
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
