Advertisements
Advertisements
प्रश्न
A physical change is temporary. Explain.
Advertisements
उत्तर
A physical change is defined as a change in which no new substance is formed.
A physical change is temporary because this change can be easily reversed by reversing the conditions. For example when ice is melted, it gets converted into water by absorbing heat. Water so formed can be easily converted to ice by cooling thus heat is released. Thus physical change is temporary.
APPEARS IN
संबंधित प्रश्न
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
A physical change is temporary. Explain.
Fill in the blank
Revolution of the earth around the sun is a ________ change.
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
Classify the following as physical or chemical change :
Growth of a plant
Which of the following are physical changes and which are chemical changes ?
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Digestion of food is a physical change.
