Advertisements
Advertisements
Question
A piece of iron is heated till it becomes red-hot. it then becomes soft and is beaten to a desired shape. What kind of changes are observed in this process-reversible or irreversible?
Advertisements
Solution
A piece of iron on heating can be beaten into desired shape. It is a reversible change because the object of desired shape can be again heated and beated to give the original shape.
APPEARS IN
RELATED QUESTIONS
Very Short Answer Type Question:
Give two examples of reversible changes.
Very Short Answer Type Question:
Give two examples of irreversible changes.
Short Answer Type Question:
What happens when sugar is heated?
Long Answer Type Question:
How does curd being set? Is this change reversible?
Drying of wet clothes in air is an example of
When a candle is lit the following changes are observed.
- Wax melts.
- Candle keeps burning.
- The size of the candle decreases.
- The molten wax solidifies
- Which of the changes can be reversed? Justify your answer
Periodical removal of one of the products of a reversible reaction increases the yield.
Rolling of chapati and baking of chapati are the changes that ______.
Give one example of change which occurs on heating but cannot be reversed.
Paheli mixed flour and water and
- made a dough,
- rolled the dough to make a chapati,
- baked the chapati on a pan,
- dried the chapati and ground it in a grinder to make powder.
Identify the changes (i) to (iv) as the changes that can be reversed or that cannot be reversed.
