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Ice floats in the oceans because
  • a)
    Ice is a bad conductor of heat
  • b)
    Since the surface of the lake is at the same temperature as the air, no heat is lost
  • c)
    The salt content of oceans lowers the freezing point by about 2°C
  • d)
    None of the statements (a), (b) and (c) given above is correct 
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Ice floats in the oceans becausea)Ice is a bad conductor of heatb)Sinc...
Density of saltwater and ice 
The density of water is dependent on the dissolved salt content as well as the temperature of the water. Ice still floats in the oceans, otherwise, they would freeze from the bottom up. However, the salt content of oceans lowers the freezing point by about 2°C  and lowers the temperature of the density maximum of water to the freezing point. This is why, in ocean water, the downward convection of colder water is not blocked by an expansion of water as it becomes colder near the freezing point. The oceans' cold water near the freezing point continues to sink. For this reason, any creature attempting to survive at the bottom of such cold water as the Arctic Ocean generally lives in water that is 4°C colder than the temperature at the bottom of frozen-over freshwater lakes and rivers in the winter. 
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Ice floats in the oceans becausea)Ice is a bad conductor of heatb)Since the surface of the lake is at the same temperature as the air, no heat is lostc)The salt content of oceans lowers the freezing point by about 2°Cd)None of the statements (a), (b) and (c) given above is correctCorrect answer is option 'C'. Can you explain this answer? for UPSC 2025 is part of UPSC preparation. The Question and answers have been prepared according to the UPSC exam syllabus. Information about Ice floats in the oceans becausea)Ice is a bad conductor of heatb)Since the surface of the lake is at the same temperature as the air, no heat is lostc)The salt content of oceans lowers the freezing point by about 2°Cd)None of the statements (a), (b) and (c) given above is correctCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for UPSC 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Ice floats in the oceans becausea)Ice is a bad conductor of heatb)Since the surface of the lake is at the same temperature as the air, no heat is lostc)The salt content of oceans lowers the freezing point by about 2°Cd)None of the statements (a), (b) and (c) given above is correctCorrect answer is option 'C'. Can you explain this answer?.
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