JEE Main 2021PhysicsKinetic Theory of GasesMediumMCQ

JEE Main 2021 — Kinetic Theory of Gases Question with Solution

JEE Main 2021 (27 Aug Shift 1)

Question

A balloon carries a total load of 185 kg at normal pressure and temperature of 27°C. What load will the balloon carry on rising to a height at which the barometric pressure is 45 cm of Hg and the temperature is -7°C. Assuming the volume constant?

Choose an option

Show full solutionCorrect option: B
Correct answer
B123.54 kg

Step-by-step explanation

ρair=gv=mg

ρair=V=185 kg

ρairgv=m'g

ρairP'P×TT'V=m'

1854576×300266=m'

m’ =123.54 kg

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About this question

This is a previous-year question from JEE Main 2021, covering the Kinetic Theory of Gases chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.