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5
MCQ (Single Correct Answer)

Volume versus temperature graphs for a given mass of an ideal gas are shown in figure. At two different values of constant pressure. What can be inferred about relation between $p_1$ and $p_2$ ?

A
$p_1>p_2$
B
$p_1=p_2$
C
$p_1< p_2$
D
Data is insufficient
6
MCQ (Single Correct Answer)

1 mole of $\mathrm{H}_2$ gas is contained in a box of volume $V=1.00 \mathrm{~m}^3$ at $T=300 \mathrm{~K}$. The gas is heated to a temperature of $T=3000 \mathrm{~K}$ and the gas gets converted to a gas of hydrogen atoms. The final pressure would be (considering all gases to be ideal)

A
same as the pressure initially
B
2 times the pressure initially
C
10 times the pressure initially
D
20 times the pressure initially
7
MCQ (Single Correct Answer)

A vessel of volume $V$ contains a mixture of 1 mole of hydrogen and 1 mole oxygen (both considered as ideal). Let $f_1(v) d v$, denote the fraction of molecules with speed between $v$ and $(v+d v)$ with $f_2(v) d v$, similarly for oxygen. Then,

A
$f_1(v)+f_2(v)=f(v)$ obeys the Maxwell's distribution law
B
$f_1(v), f_2(v)$ will obey the Maxwell's distribution law separately
C
neither $f_1(v)$, nor $f_2(v)$ will obey the Maxwell's distribution law
D
$f_2(v)$ and $f_1(v)$ will be the same
8
MCQ (Single Correct Answer)

An inflated rubber balloon contains one mole of an ideal gas, has a pressure $p$, volume $V$ and temperature $T$. If the temperature rises to 1.1 T , and the volume is increased to 1.05 V , the final pressure will be

A
$1.1 p$
B
$p$
C
less than $p$
D
between $p$ and 1.1
9
MCQ (Multiple Correct Answer)

$A B C D E F G H$ is a hollow cube made of an insulator (figure) face $A B C D$ has positive charge on it. Inside the cube, we have ionised hydrogen. The usual kinetic theory expression for pressure

A
will be valid
B
will not be valid, since the ions would experience forces other than due to collisions with the walls
C
will not be valid, since collisions with walls would not be elastic
D
will not be valid because isotropy is lost