Chemistry Thermochemistry SZABMU 2024
PMDC Verified Question 9 of 81
One calorie is equivalent to:
A
\( 41.84 \text{ J} \)
B
\( 4.184 \text{ J} \)
C
\( 0.4184 \text{ J} \)
D
\( 418.4 \text{ J} \)
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: \( 4.184 \text{ J} \)
Concept:

Energy unit conversions are strictly defined by thermodynamic standards. A calorie is the energy needed to heat 1g of water by 1°C.

Formula:

$$ 1 \text{ calorie} = 4.184 \text{ Joules} $$

Solution:

  • This is a fundamental memorization constant in physical chemistry.


  • Exactly 1 calorie is mathematically equivalent to \( 4.184 \text{ J} \).


Why other options are incorrect:

Options with decimal shifts (like 41.84 or 0.4184) are incorrect by factors of 10. (Note: Option C and D duplicate in the original test paper).

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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