1
JEE Main 2023 (Online) 25th January Morning Shift
+4
-1
Out of Syllabus

A Carnot engine with efficiency 50% takes heat from a source at 600 K. In order to increase the efficiency to 70%, keeping the temperature of sink same, the new temperature of the source will be :

A
300 K
B
1000 K
C
900 K
D
360 K
2
JEE Main 2023 (Online) 24th January Evening Shift
+4
-1

Let $$\gamma_1$$ be the ratio of molar specific heat at constant pressure and molar specific heat at constant volume of a monoatomic gas and $$\gamma_2$$ be the similar ratio of diatomic gas. Considering the diatomic gas molecule as a rigid rotator, the ratio, $$\frac{\gamma_1}{\gamma_2}$$ is :

A
$$\frac{35}{27}$$
B
$$\frac{25}{21}$$
C
$$\frac{21}{25}$$
D
$$\frac{27}{35}$$
3
JEE Main 2023 (Online) 24th January Evening Shift
+4
-1

In an Isothermal change, the change in pressure and volume of a gas can be represented for three different temperature; $$\mathrm{T_3 > T_2 > T_1}$$ as :

A
B
C
D
4
JEE Main 2023 (Online) 24th January Morning Shift
+4
-1

1 g of a liquid is converted to vapour at 3 $$\times$$ 10$$^5$$ Pa pressure. If 10% of the heat supplied is used for increasing the volume by 1600 cm$$^3$$ during this phase change, then the increase in internal energy in the process will be :

A
4800 J
B
4320 J
C
432000 J
D
4.32 $$\times$$ 10$$^8$$ J
EXAM MAP
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