JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumCalculation

JEE Main 27 August 2021, Shift 1, Physics Q8

Question 8 of 90 in this shift, Physics question 8 of 30, Section A.

A balloon carries a total load of 185 kg at normal pressure and temperature of

27^\circ

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^\circ

C. Assuming the volume constant ?

(1)123.54 kgOfficial answer
(2)214.15 kg
(3)219.07 kg
(4)181.46 kg

Official answer

Option 1

NTA final key.

Chapter: Kinetic Theory
Topic: Fluid Statics
Idea tested: Gas Balloon Payload Capacity

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.