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Thermometry, Thermal Expansion and Calorimetry — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsThermometry, Thermal Expansion and Calorimetry1 Mark
MCQ
Maximum density of $\mathrm{H}_2 \mathrm{O}$ is at the temperature
  • A
    $32^{\circ} \mathrm{F}$
  • ✓
    $39.2^{\circ} \mathrm{F}$
  • C
    $42^{\circ} F$
  • D
    $4^{\circ} \mathrm{F}$
✓

Answer

Correct option: B.
$39.2^{\circ} \mathrm{F}$
(b) Maximum density of water is at $4^{\circ} \mathrm{C}$ Also $\frac{C}{5}=\frac{F-32}{9} \Rightarrow \frac{4}{5}=\frac{F-32}{9} \Rightarrow F=39.2^{\circ} \mathrm{F}$

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