JEE Main 2022 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 26 June 2022, Shift 2, Physics Q54

Question 54 of 90 in this shift, Physics question 24 of 30, Section B.

A geyser heats water flowing at a rate of 2.0 kg per minute from

30^\circ

C to

70^\circ

C. If geyser operates on a gas burner, the rate of combustion of fuel will be ________

g\ min^{-1}

[Heat of combustion =

8 \times 10^{3}\ Jg^{-1}

, Specific heat of water =

4.2\ Jg^{-1}\,{}^\circ C^{-1}

]

Official answer

NTA final key.

Chapter: Thermal Properties of Matter
Topic: Calorimetry
Idea tested: Specific Heat Capacity

Same idea in other shifts

Asked 3× in all

26 Aug 2021, Shift 2 · Q12The temperature of equal masses of three different liquids $x$ , $y$ and $z$ are $10^\circ$ C, $20^\circ$ C and $30^\circ$ C respectively. The…MediumSingle correct
27 Aug 2021, Shift 2 · Q7The height of victoria falls is 63 m. What is the difference in temperature of water at the top and at the bottom of fall ? [Given 1…EasySingle correct

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.