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प्रश्न
Which of the following are physical changes and which are chemical changes ?
Rusting of iron
विकल्प
Physical change
Chemical change
उत्तर
Rusting of iron – Chemical change
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संबंधित प्रश्न
Classify the following changes as physical or chemical: curdling of milk
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
State whether the following is physical or chemical changes.
mixing oil with water —
True or false
In a physical change no net energy change is involved.
Classify the Following as a Physical Or a Chemical Change.
Curdling of Milk
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
State which of the following pertain to – chemical changes.
(a) Substance retains its identity
(b) The change is permanent
(c) No new substance is formed
(d) Is easily reversible
(e) Produces one or more new substances by a change in its composition
(f) The change is temporary
(g) The composition and properties of the original substance are not altered.
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
Select the correct answer from the choice given below to complete the sentence
The dissolution of lead nitrate in water is deemed as a _________ change.
What type of energy changes is associated when ice melts?
