मराठी

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
Advertisements

प्रश्न

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?

लघु उत्तर
Advertisements

उत्तर

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.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 6: Changes Around Us - Very Short Answer Questions [पृष्ठ ३४]

APPEARS IN

एनसीईआरटी एक्झांप्लर Science Exemplar [English] Class 6
पाठ 6 Changes Around Us
Very Short Answer Questions | Q 9. | पृष्ठ ३४

संबंधित प्रश्‍न

Very Short Answer Type Question:
Give two examples of reversible changes.


Short Answer Type Question:
What is a chemical change? Explain with example.


Burning of match stick is a reversible change.


Differentiate reversible and irreversible reactions.


Name the two types of changes.


Analogy:

Irreversible change: Making idly front batter.
Reversible change: ______.


Which of the following changes cannot be reversed?

  1. Blowing of a balloon
  2. Folding paper to make a toy aeroplane
  3. Rolling a ball of dough to make roti
  4. Baking cake in an oven
  5. Drying a wet cloth
  6. Making biogas from cow dung
  7. Burning of a candle

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.


lt was Paheli’s birthday, her brother Simba was helping her to decorate the house for the birthday party and their parents were also busy making other arrangements. Following were the activities going on at Paheli’s home:

  1. Simba blew balloons and put them on the wall.
  2. Some of the balloons got burst.
  3. Paheli cut colourful strips of paper and put them on the wall with the help of tape.
  4. She also made some flowers by origami (paper folding) to decorate the house.
  5. Her father made dough balls.
    Mother rolled the dough balls to make puries.
  6. Mother heated oil in a pan.
  7. Father fried the puries in hot oil.

Identify the activities at Paheli’s home as those that can be reversed and those which cannot be reversed.


Choose the odd one out. Give a reason for your choice.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×