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प्रश्न
Classify the following as chemical or physical change:
Burning of paper and wood
विकल्प
Chemical change
Physical change
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उत्तर
Chemical change
Explanation:
Burning paper is a chemical change since the combustion products, carbon dioxide, water vapours, smoke, and ash, cannot be turned back into paper or wood using any physical means.
संबंधित प्रश्न
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Photosynthesis cannot take place at night.
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
What will you take into account while identifying the following?
A chemical change in a substance.
Fill in the blank with the correct word of the statement given below:
Sublimation of iodine is an example of _________ change.
Select the chemical changes from the following list of changes
Breaking of glass
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
Wood to sawdust:______:: Wood to Ash: Chemical change
