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Saturday, 31 October

JEE Main 2020 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 8 January 2020, Shift 2, Physics Q23

Question 23 of 75 in this shift, Physics question 23 of 25, Section B.

Three containers C1C_1, C2C_2 and C3C_3 have water at different temperatures. The table below shows the final temperature T when different amounts of water (given in liters) are taken from each container and mixed (assume no loss of heat during the process) C1C_1 | C2C_2 | C3C_3 | TT 1l | 2l | -- | 60°C -- | 1l | 2l | 30°C 2l | -- | 1l | 60°C 1l | 1l | 1l | θ\theta The value of θ\theta (in °C to the nearest integer) is __________.

Official answer

50.00

NTA final key (Jan 2020).

Chapter
Thermal Properties of Matter
Topic
Calorimetry
Idea tested
Three-Liquid Mixing

Same topic in other shifts

All Calorimetry questions
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  6. 25 Jul 2022, Shift 2 · Q53A block of ice of mass 120 g at temperature 0°C is put in 300 g of water at 25°C. The xxg of ice melts as the temperature of the water…EasyNumerical value

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.