Advertisements
Advertisements
प्रश्न
Boojho’s sister broke a white dove, a symbol of peace, made of Plaster of Paris (POP). Boojho tried to reconstruct the toy by making a powder of the broken pieces and then making a paste by mixing water. Will he be successful in his effort? Justify your answer.
Advertisements
उत्तर
Boojho will not be successful because making of toy from Plaster of Paris (POP) is an irreversible change. Once the Plaster of Paris is mixed with water and dried it cannot regain its properties.
APPEARS IN
संबंधित प्रश्न
A stretched rubber band comes back to normal shape. It is an example for ________.
Formation of curd from milk is
Analogy
Dissolution of glucose : reversible change :: Digestion of food: ___________ change
Analogy:
Irreversible change: Making idly front batter.
Reversible change: ______.
Can we reverse the following change? If yes, suggest the name of the method.
Curd into milk
A potter working on his wheel shaped a lump of clay into a pot. He then baked the pot in an oven. Do these two acts lead to the same kind of changes or different? Give your opinion and justify your answer.
Conversion of ice into water and water into ice is an example of change which can be reversed. Give four more examples where you can say that the changes can be reversed.
Choose the odd one out. Give a reason for your choice.
Find the odd one out. Give reason for your choice.
Find the odd one out. Give reason for your choice.
