1
JEE Main 2023 (Online) 8th April Morning Shift
+4
-1 Given below are two statements:

Statement I: If heat is added to a system, its temperature must increase.

Statement II: If positive work is done by a system in a thermodynamic process, its volume must increase.

In the light of the above statements, choose the correct answer from the options given below

A
Both Statement I and Statement II are true
B
Statement I is false but Statement II is true
C
Statement I is true but Statement II is false
D
Both Statement I and Statement II are false
2
JEE Main 2023 (Online) 6th April Evening Shift
+4
-1 The temperature of an ideal gas is increased from $$200 \mathrm{~K}$$ to $$800 \mathrm{~K}$$. If r.m.s. speed of gas at $$200 \mathrm{~K}$$ is $$v_{0}$$. Then, r.m.s. speed of the gas at $$800 \mathrm{~K}$$ will be:

A
$$v_{0}$$
B
$$2 v_{0}$$
C
$$4 v_{0}$$
D
$$\frac{v_{0}}{4}$$
3
JEE Main 2023 (Online) 6th April Evening Shift
+4
-1 A body cools in 7 minutes from $$60^{\circ} \mathrm{C}$$ to $$40^{\circ} \mathrm{C}$$. The temperature of the surrounding is $$10^{\circ} \mathrm{C}$$. The temperature of the body after the next 7 minutes will be:

A
$$34^{\circ} \mathrm{C}$$
B
$$28^{\circ} \mathrm{C}$$
C
$$32^{\circ} \mathrm{C}$$
D
$$30^{\circ} \mathrm{C}$$
4
JEE Main 2023 (Online) 6th April Evening Shift
+4
-1 The ratio of speed of sound in hydrogen gas to the speed of sound in oxygen gas at the same temperature is:

A
$$1: 1$$
B
$$1: 2$$
C
$$1: 4$$
D
$$4: 1$$
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