मराठी

An iron ring is heated. Which of the following statement about it is incorrect?

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प्रश्न

An iron ring is heated. Which of the following statement about it is incorrect?

पर्याय

  • The ring expands.

  • The ring almost comes to the same size on cooling.

  • The change in this case is reversed.

  • The ring changes its shape and the change cannot be reversed.

MCQ
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उत्तर

The ring changes its shape and the change cannot be reversed.

Explanation:

The ring expands on heating and comes back to its original size on cooling. The change is reversible.

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पाठ 6: Changes Around Us - Multiple Choice Questions [पृष्ठ ३२]

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एनसीईआरटी एक्झांप्लर Science [English] Class 6
पाठ 6 Changes Around Us
Multiple Choice Questions | Q 3. | पृष्ठ ३२

संबंधित प्रश्‍न

Long Answer Type Question:
Explain how a metal rim slightly smaller than a wooden wheel can be fixed on it.


Drying of wet clothes in air is an example of


Water changes into ice on cooling is an example of ______.


Evaporation of water is a reversible change.


Name the two types of changes.


Look at the figure which shows three situations.

Which of these shows a reversible change and why?


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.


Give one example of change which occurs on heating but can be reversed.


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.


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