A very hot glass on putting under cold water cracks. This change is due to _______.
A) expansion B) contraction C) formation of new substance D) None of these
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B) contraction
As the glass is hot it surface molecules are in expanded state though glass being an insulator. Its molecules on surface contracts rapidly and unevenly compared to inner molecules on being put in cold water. So it breaks.
As the glass is hot it surface molecules are in expanded state though glass being an insulator. Its molecules on surface contracts rapidly and unevenly compared to inner molecules on being put in cold water. So it breaks.
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