Chemistry Gases BUMHS 2024
PMDC Verified Question 14 of 65
5 calories are equivalent to joule.
A
4.184
B
10.26
C
20.92
D
25.65
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: 20.92
Concept:

The calorie is a historical unit of energy defined as the amount of heat required to raise the temperature of 1 gram of water by 1°C. It has a strict conversion factor to the SI unit of energy, the Joule.

Formula:

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

Solution:

  • To find the equivalent energy of 5 calories in Joules, we multiply by the conversion factor.


  • \( \text{Energy in Joules} = 5 \text{ cal} \times 4.184 \text{ J/cal} \).


  • Calculation: \( 5 \times 4 = 20 \) and \( 5 \times 0.184 = 0.92 \).


  • Adding them together gives 20.92 Joules.


Why other options are incorrect:

  • Option A: This is the value for exactly 1 calorie, not 5.
  • Options B & D: These are mathematically incorrect multiplications of the conversion factor.

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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