JEE Main 2019 (Online) 11th January Evening Slot | Heat and Thermodynamics Question 328 | Physics

When 100 g of a liquid A at 100^oC is added to 50 g of a liquid B at temperature 75^oC, the temperature of the mixture becomes 90^oC. The temperature of the mixture, if 100 g of liquid A at 100^oC is added to 50 g of liquid B at 50^oC, will be :

60^oC

70^oC

85^oC

80^oC

JEE Main 2019 (Online) 11th January Evening Slot

MCQ (Single Correct Answer)

-1

Two rods A and B of identical dimensions are at temperature 30^°C. If A is heated upto 180^oC and B upto T^oC, then the new lengths are the same. If the ratio of the coefficients of linear expansion of A and B is 4 : 3, then the value of T is

200^oC

270^oC

230^oC

250^oC

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

-1

A rigid diatomic ideal gas undergoes an adiabatic process at room temperature. The relation between temperature and volume for this process is TV^x = constant, then x is :

$${5 \over 3}$$

$${2 \over 5}$$

$${3 \over 5}$$

$${2 \over 3}$$

JEE Main 2019 (Online) 11th January Morning Slot

MCQ (Single Correct Answer)

-1

A gas mixture consists of 3 moles of oxygen and 5 moles of argon at temperature T. considering only translational and rotational modes, the total internal energy of the system is :

12 RT

20 RT

4 RT

15 RT

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