Ice starts forming in lake with water at \[{{0}^{o}}C\] and when the atmospheric temperature is \[-{{10}^{o}}C\]. If the time taken for 1 cm of ice be 7 hours, then the time taken for the thickness of ice to change from 1 cm to 2 cm is [NCERT 1971; MP PMT/PET 1988; UPSEAT 1996]

Ice starts forming in lake with water at \[{{0}^{o}}C\] and when the a

1.	Ice starts forming in lake with water at \[{{0}^{o}}C\] and when the atmospheric temperature is \[-{{10}^{o}}C\]. If the time taken for 1 cm of ice be 7 hours, then the time taken for the thickness of ice to change from 1 cm to 2 cm is [NCERT 1971; MP PMT/PET 1988; UPSEAT 1996]
A.	7 hours
B.	14 hours
C.	\[R\sqrt{2}\]
D.	More than 7 hours
Answer» E.

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