1
JEE Main 2023 (Online) 13th April Morning Shift
+4
-1

The rms speed of oxygen molecule in a vessel at particular temperature is $$\left(1+\frac{5}{x}\right)^{\frac{1}{2}} v$$, where $$v$$ is the average speed of the molecule. The value of $$x$$ will be:

$$\left(\right.$$ Take $$\left.\pi=\frac{22}{7}\right)$$

A
4
B
8
C
28
D
27
2
JEE Main 2023 (Online) 12th April Morning Shift
+4
-1
Out of Syllabus

An engine operating between the boiling and freezing points of water will have

A. efficiency more than 27%.

B. efficiency less than the efficiency of a Carnot engine operating between the same two temperatures.

C. efficiency equal to $$27 \%$$

D. efficiency less than $$27 \%$$

Choose the correct answer from the options given below:

A
B and C only
B
B and D only
C
B, C and D only
D
A and B only
3
JEE Main 2023 (Online) 12th April Morning Shift
+4
-1

If the r. m.s speed of chlorine molecule is $$490 \mathrm{~m} / \mathrm{s}$$ at $$27^{\circ} \mathrm{C}$$, the r. m. s speed of argon molecules at the same temperature will be (Atomic mass of argon $$=39.9 \mathrm{u}$$, molecular mass of chlorine $$=70.9 \mathrm{u}$$ )

A
$$451.7 \mathrm{~m} / \mathrm{s}$$
B
$$751.7 \mathrm{~m} / \mathrm{s}$$
C
$$551.7 \mathrm{~m} / \mathrm{s}$$
D
$$651.7 \mathrm{~m} / \mathrm{s}$$
4
JEE Main 2023 (Online) 11th April Evening Shift
+4
-1

The Thermodynamic process, in which internal energy of the system remains constant is

A
Isobaric
B
Isochoric
C
D
Isothermal
EXAM MAP
Medical
NEET