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प्रश्न
Write true or false
Burning of paper and formation of curd are reversible changes.
विकल्प
True
False
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उत्तर
False.
Burning of paper and formation of curd are irreversible changes.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Rusting of almirah
What role does energy play in initiating a chemical change ?
State whether the following is physical or chemical changes.
glowing of a bulb -
Classify the following as physical or chemical change :
Condensation of steam
What will you take into account while identifying the following?
A physical change in a substance.
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
The carbon cycle.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
You are given some candle wax. Can you make a candle doll from it? What kind of change is this?
Classify the following as physical or chemical properties
The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.
