Correct4
Incorrect-1
An air bubble doubles its radius on raising from the bottom of water reservoir to be the surface of water in it. If the atmospheric pressure is equal to {tex} 10 { m } {/tex} of water, the height of water in the reservoir is
{tex} 10 m {/tex}
{tex} 20 m {/tex}
{tex} 70 m {/tex}
{tex} 80 m {/tex}
Correct4
Incorrect-1
Two spherical vessel of equal volume, are connected by a{tex} \ \ n {/tex} arrow tube. The apparatus contains an ideal gas at one atmosphere and {tex} 300 K {/tex}. Now if one vessel is immersed in a bath of constant temperature {tex} 600 K {/tex} and the other in a bath of constant temperature {tex} 300 K {/tex}. Then the common pressure will be
{tex}1atm {/tex}
{tex} \frac { 4 } { 5 } a t m {/tex}
{tex} \frac { 4 } { 3 } a t m {/tex}
{tex} \frac { 3 } { 4 } a t m {/tex}
Correct4
Incorrect-1
If pressure of {tex} C O _ { 2 } {/tex} (real gas) in a container is given by {tex} P = \frac { R T } { 2 V - b } - \frac { a } { 4 b ^ { 2 } } {/tex} then mass of the gas in container is
{tex}11 \ g m {/tex}
{tex} 22 \ g m {/tex}
{tex} 33 \ gm {/tex}
{tex} 44 \ gm {/tex}
Correct4
Incorrect-1
A gas is enclosed in a closed pot. On keeping this pot in a train moving with high speed, the temperature of the gas
Will increase
Will decrease
Will remain the same
Will change according to the nature of the gas
Correct4
Incorrect-1
If the {tex} r . m .s {/tex} velocity of a gas at a given temperature (Kelvin scale) is {tex} 300 \mathrm { m } / \mathrm { sec } . {/tex} What will be the {tex} \mathrm { r.m.s } {/tex} velocity of a gas having twice the molecular weight and half the temperature on Kelvin scale =
{tex} 300 \mathrm { m } / \mathrm { sec } {/tex}
{tex} 600 \mathrm { m } / \mathrm { sec } {/tex}
{tex} 75 \mathrm { m } / \mathrm { sec } {/tex}
{tex} 150 \mathrm { m } / \mathrm { sec } {/tex}
Correct4
Incorrect-1
The ratio of two specific heats {tex} \frac { C _ { P } } { C _ { V } } {/tex} of {tex} C O {/tex} is
1.33
1.4
1.29
1.66
Correct4
Incorrect-1
At what temperature, the mean kinetic energy of {tex} O _ { 2 } {/tex} will be the same for {tex} H _ { 2 } {/tex} molecules at {tex} - 73 ^ { \circ } \mathrm { C } {/tex}
{tex} 127 ^ { \circ } \mathrm { C } {/tex}
{tex} 527 ^ { \circ } \mathrm { C } {/tex}
{tex} - 73 ^ { \circ } \mathrm { C } {/tex}
{tex} - 173 ^ { \circ } \mathrm { C } {/tex}
Correct4
Incorrect-1
The volume of a gas at pressure {tex} 21 \times 10 ^ { 4 } N / m ^ { 2 } {/tex} and temperature {tex} 27 ^ { \circ } \mathrm { C } {/tex} is 83 litres. If {tex} R = 8.3\ J/ \mathrm { mol } / \mathrm { K } {/tex}, then the quantity of gas in {tex} \mathrm { gm-mole } {/tex} will be
15
42
7
14
Correct4
Incorrect-1
The pressure and temperature of an ideal gas in a closed vessel are {tex} 720\ { kPa } {/tex} and {tex} 40 ^ { \circ } { C } {/tex} respectively. If {tex} \frac { 1 } { 4 } {/tex} th of the gas is released from the vessel and the temperature of the remaining gas is raised to {tex} 353 ^ { \circ }{ C } , {/tex} the final pressure of the gas is
{tex} 1440 \mathrm { kPa } {/tex}
{tex} 1080 \mathrm { kPa } {/tex}
{tex} 720 \mathrm { kPa } {/tex}
{tex} 540 \mathrm { kPa } {/tex}
Correct4
Incorrect-1
The energy of a gas/litre is 300 joules, then its pressure will be
{tex} 3 \times 10 ^ { 5 } \mathrm { N } / \mathrm { m } ^ { 2 } {/tex}
{tex} 6 \times 10 ^ { 5 } \mathrm { N } / \mathrm { m } ^ { 2 } {/tex}
{tex} 10 ^ { 5 } \mathrm { N } / \mathrm { m } ^ { 2 } {/tex}
{tex} 2 \times 10 ^ { 5 } \mathrm { N } / \mathrm { m } ^ { 2 } {/tex}
Correct4
Incorrect-1
A pressure cooker contains air at 1 atm and {tex} 30 ^ { \circ } \mathrm { C } {/tex}. If the safety value of the cooler blows when the inside pressure {tex} \geq 3\ atm {/tex} , then the maximum temperature of the air, inside the cooker can be
{tex} 90 ^ { \circ } \mathrm { C } {/tex}
{tex} 636 ^ { \circ } \mathrm { C } {/tex}
{tex} 909 ^ { \circ } \mathrm { C } {/tex}
{tex} 363 ^ { \circ } \mathrm { C } {/tex}
Correct4
Incorrect-1
From the following {tex} V - T {/tex} diagram we can conclude
{tex} P_{1} = P_{2} {/tex}
{tex} P_{1} > P_{2} {/tex}
{tex} P_{1}< P_{2} {/tex}
None of these
Correct4
Incorrect-1
The {tex} r . m .s {/tex} velocity of a gas at a certain temperature is {tex} \sqrt { 2 } {/tex} times than that of the oxygen molecules at that temperature. The gas can be
{tex} H _ { 2 } {/tex}
{tex} H e {/tex}
{tex} C H _ { 4 } {/tex}
{tex} S O _ { 2 } {/tex}
Correct4
Incorrect-1
One mole of an ideal monatomic gas requires {tex}210\ J{/tex} heat to raise the temperature by {tex} 10 K , {/tex} when heated at constant temperature. If the same gas is heated at constant volume to raise the temperature by {tex}10 K {/tex} then heat required is
{tex} 238\ J {/tex}
{tex} 126\ J {/tex}
{tex} 210 \ J{/tex}
{tex}350\ J{/tex}
Correct4
Incorrect-1
When the temperature of a gas is raised from {tex} 27 ^ { \circ } \mathrm { C } {/tex} to {tex} 90 ^ { \circ } \mathrm { C } , {/tex} the percentage increase in the {tex} r . m .s {/tex} velocity of the molecules will be
{tex} 10 \% {/tex}
{tex} 15 \% {/tex}
{tex} 20 \% {/tex}
{tex} 17.5 \% {/tex}
Correct4
Incorrect-1
Pressure versus temperature graphs of an ideal gas are as shown in figure. Choose the wrong statement
Density of gas is increasing in graph (i)
Density of gas is decreasing in graph (ii)
Density of gas is constant in graph (iii)
None of these
Correct4
Incorrect-1
An ideal gas has an initial pressure of 3 pressure units and an initial volume of 4 volume units. The table gives the final pressure and volume of the gas (in those same units) in four, processes. Which processes start and end on the same isotherm
{tex} A {/tex}
{tex} B {/tex}
{tex} C {/tex}
{tex} D {/tex}
so, final {tex}{ P }{ V }=12{/tex}
Hence, option C is correct.
Correct4
Incorrect-1
A cylinder of fixed capacity {tex}44.8\ litre{/tex}, contains a monatomic gas at standard temperature and pressure. The amount of heat required to cylinder by {tex} 10 ^ { \circ } \mathrm { C } {/tex} will be. {tex} ( R = {/tex} universal gas constant)
{tex} R {/tex}
{tex} 10 R {/tex}
{tex} 20 R {/tex}
{tex} 30 R {/tex}
Correct4
Incorrect-1
Suppose ideal gas equation {tex} V {/tex} follows {tex} 3VP = constant{/tex}. Initial temperature and volume of the gas are {tex} T {/tex} and {tex} V {/tex} respectively. If gas expand to {tex} 27\ V {/tex} then its temperature will be come
{tex} T {/tex}
{tex} 9 \ T {/tex}
{tex} 27 \ T {/tex}
{tex} T / 9 {/tex}
Correct4
Incorrect-1
One mole of a monoatomic ideal gas is mixed with one mole of a diatomic ideal gas. The molar specific heat of the mixture at constant volume is
{tex} 8 {/tex}
{tex} \frac { 3 } { 2 } \ R {/tex}
{tex} 2\ R {/tex}
{tex} 2.5\ R {/tex}
