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1402. Which of the following has maximum thermal conductivity?

September 7, 2025 by Admin

Iron

Coal

Nitrogen

Tar

✅ The correct answer is option A.

Categories Chemical Engineering, Engineering, Heat Transfer MCQs Tags Chemical Engineering MCQs, Engineering MCQs, Heat Transfer MCQs

1400. In Joule’s experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is

1404. For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally

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