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[ Question Bank ] - 2022 — Science STD 10 — Question

Maharashtra BoardEnglish MediumSTD 10Science[ Question Bank ] - 20222 Marks
Question
Write scientific reason.
Placing a plastic bottle filled with water in the freezing compartment in the freezer can cause the bottle to explode.
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Answer

  1. Temperature of the freezer section in a refrigerator is maintained below 0 °C.
  2. When a plastic bottle filled completely with water is placed in the freezer, the temperature of water starts falling down.
  3. When the temperature of water reaches 4 °C, due to its anomalous behaviour, water starts expanding.
  4. As the temperature of water continues to fall upto 0 °C, water continues to expand. When water is converted into ice at 0 °C, there is an increase in the volume.
  5. This exerts pressure on the sides of the bottle. As a result, there is a probability of breaking or exploding of the bottle.

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