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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 changes as physical or chemical:- photosynthesis in plants
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
Write true or false
Decomposition of leaves is a fast change.
Classify the following as physical or chemical change :
Formation of curd from milk
Which of the following are physical changes and which are chemical changes ?
State the observations seen, when milk in a dish is kept aside for a few hours or more. Is the change which occurs – a physical change or a chemical change. Give reasons.
Give the reason why the following is considered as chemical changes.
A bright light is seen evolved when a strip of magnesium is heated.
Give the reason why the following is considered as chemical changes.
An iron nail kept open in the atmosphere rusts.
Which of the following is not a physical change?
Iron pipes coated with zinc do not get rusted easily.
