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STD 11 - 10.1. thermonetry,thermal expansion and calorimetry — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 11 - 10.1. thermonetry,thermal expansion and calorimetry4 Marks
MCQ
$Assertion :$ Fahrenheit is the smallest unit measuring temperature.
$Reason :$ Fahrenheit was the first temperature scale used for measuring temperature.
  • A
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • C
    If the Assertion is correct but Reason is incorrect.
  • ✓
    If the Assertion is incorrect but the Reason is correct.
✓

Answer

Correct option: D.
If the Assertion is incorrect but the Reason is correct.
d
Here, Assertion is incorrect and Reason is correct. The temperature difference between boiling point of water and freezing point of water has been divided into $100$ parts in $^oC$ scale, $180$ parts in Fahrenheit scale, $80$ parts in Reaumer scale and $212$ parts in Rankine scale. So, Rankine scale is the smallest unit. Assertion is incorrect. Fahrenheit was the first temperature scale used for measuring temperature. So, the Reason is correct.

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