Question 3 :
The volume occupied by 7 grams of nitrogen gas at STP is:
Question 8 :
Ideal gas equation in terms of KE per unit volume, $E$, is<br>
Question 9 :
Assuming that the behavior of ammonia is correctly described by the van der Waal's equation near the critical point, and knowing the critical molar volume of 0.72500 mol $L^{-1}$ and critical temperature of 405.3 K, determine the critical pressure of ammonia. <br>
Question 10 :
However greater the pressure, a gas CANNOT be liquefied above its:
Question 11 :
Which among the following is not the property of ideal gas?<br/>
Question 12 :
The boiling point of a liquid with the increase of pressure, ______________.
Question 14 :
By how many folds the temperature of a gas would increase when the root mean square velocity of the gas molecule in a container of fixed volume from $5\times { 10 }^{ 4\quad }cm/s$ to $10\times { 10 }^{ 4\quad }cm/s$?
Question 16 :
If the critical temperature of a gas is $100^{0}C$, its Boyle's temperature will be :
Question 19 :
Assertion: $NH_3$ gas is more easily liquefiable than $CO_2$ gas.
Reason: $NH_3$ gas has higher critical temperature than that of $CO_2$ gas.
Question 20 :
Which of the following expressions correctly represents the van der Waals equation of state?
Question 21 :
Which of the liquids in each of the following pairs has a higher vapour pressure?
Question 23 :
$'a'$ and $'b'$ are van waals constants for gases, Chlorine is more easily liquefied than ethane because:
Question 24 :
As shown in the figure at $200\ K$ and $500\ atm$ value of compressibility factor is $2$(approx). Then the volume of the gas at this point will be:
Question 25 :
State whether given statement is True or False<br/>The degree of hotness or coldness of any substance is called Temperature?<br/>
Question 28 :
Which tool allows liquids to be swirled with a low risk of spilling?
Question 29 :
At a temperature below critical temperature, nitrogen cannot be liquefied on compression.<br/>
Question 30 :
Ratio of average kinetic energy of $14 g$ of $N_{2}$ at $27^oC$ to $24 g$ of $O_{2}$ at $227^oC$ is _____.
Question 32 :
For a van der Waals gas compressibility factor at 273.15 K is 1.5. The molar volume of this gas at 273.15 K is (assume P = 1 atm)
Question 34 :
The temperature and pressure at which ice, liquid. water and water vapour can exist together are ?
Question 35 :
If temperature and volume are same, the pressure of a gas obeying Vander Waals equation is:
Question 36 :
The pressure at which liquid and vapour can coexist at equilibrium is called the :
Question 38 :
The relative humidity ......... inspite of increase in absolute humidity with increase in temperature :
Question 39 :
High viscosity of water can be explained on the basis of:
Question 41 : Statement: The property of liquid to resist their flow is called viscosity.<div>State whether the given statement is true or false.</div>
Question 42 :
Which of the following solution in water will have the lowest vapour pressure?
Question 43 :
The correct relationship between critical temperature ($T_c$) and Boyle's temperature ($T_g$) for $CO_{2}$ gas is:
Question 44 :
A certain number of spherical drops of a liquid of radius r coalesce to form a single drop of radius $R$ and volume $V$. If $T$ is the surface tension of the liquid, then.
Question 45 :
Assertion: Hot soup tastes better than the cold soup.
Reason: Hot soup has high surface tension and it does not spread properly on our tongue.
Question 46 :
Vander waal's real gas, act as a ideal gas, at which conditions:<br/>
Question 50 :
Kinetic energy of 0.3 mole of 'He' gas in a container of maximum capacity of 4 litre at 5 atm, must be : <br>(R= 0.0821 atm litre $mol^{-1}\, K^{-1}$)
Question 51 : <div>State True or False.<br/></div>A gas above its $T_c$ or its critical temperature can be liquefied.<br/>
Question 52 :
Among the following, which should have the highest r.m.s. speed at the same temperature?
Question 53 :
To which of the following gaseous mixtures is Dalton's law not applicable?
Question 54 :
1 mol of ferrous oxalate will require x mol of $KMnO_4$ in acidic medium, where x is:
Question 55 :
50 $ml$ of hydrogen diffuses through a small hole in 20 minutes. The time taken for 40 $ml$ of oxygen to diffuse under the same conditions in minutes is:
Question 56 :
At atmospheric pressure, a litre vessel contains a mixture of Helium and Nitrogen. If partial pressure of Nitrogen is 500 mm, the partial pressure of Helium will be:
Question 57 :
Equal amounts of two gases of molecular weight $4$ and $40$ are mixed. The pressure of the mixture is $1.1\ atm$. The partial pressure of the light gas in this mixture is:
Question 58 : For three different gases, values of van der Waal's constant 'a' and 'b' are given. What is the correct order of liquefaction of gases?<br><table class="wysiwyg-table"><tbody><tr><td>Gas</td><td>'a'</td><td>'b'</td></tr><tr><td>$X_2$</td><td>1.3</td><td>0.090</td></tr><tr><td>$Y_2$</td><td>4.1</td><td>0.023</td></tr><tr><td>$Z_2$</td><td>2.2</td><td>0.075</td></tr></tbody></table>
Question 59 :
A gaseous mixture was prepared by taking equal mole of $CO$ and ${ N }_{ 2 }$. If the total pressure of the mixture was found $1$ atmosphere, the partial pressure of the nitrogen $({ N }_{ 2 })$ in the mixture is:
Question 60 :
Pure hydrogen sulphide is stored in a tank of $100$ litre capacity at ${20^0}C$ and $2$ atm pressure . The mass of the gas will be:
Question 61 :
The critical temperature of water is higher than that of $O_{2}$ because $H_{2}O$ molecule has
Question 62 :
The pressure of $2$ moles of ideal gas at $546 K$ having volume $44.8$ litres is:
Question 63 : Which of the following is true?<div>Here, $\alpha$ is the most probable velocity and $\overline v$ is the average velocity.</div>
Question 66 :
Ratio of rates of diffusion of $He$ and ${ CH }_{ 4 }$: (under identical conditions).
Question 67 :
A solution at $20^o$C is composed of $1.5$ mol of benzene and $3.5$ mol of toluene. If the vapour pressure of pure benzene of pure benzene and pure toluene at this temperature are $74.7$ torr and $22.3$ torr. respectively, then the total vapour pressure of the solution and the benzene mole fraction in equilibrium with it will be, respectively.
Question 68 :
A vessel is filled with a mixture of oxygen and nitrogen. At what ratio of the partial pressure will the masses of the gases be identical?
Question 69 :
Which of the following statements is true about a balloon filled with 1.00 mol of $CO_2$ at STP?<br/>I. The contents of the balloon have a mass of $44.0$ g.<br/>II. The balloon has a volume of $22.4$ L.<br/>III. The balloon contains $6.02 \times 10^{23}$ molecules.<br/>
Question 70 :
In $P$ versus $V$ graph, the horizontal line is found in which ........ exits
Question 71 :
The average velocity of an ideal gas at $0^oC$ is $0.4$ m/s. If the temperature of gas is increased to $546^oC$, its average velocity will be:
Question 72 :
Assertion: The volume of $1$ mole of an ideal gas at $1$ bar pressure at $25^{0}C$ is $24.78$ L<br/>Reason: $1$ bar $=0.987$ atm<br/>
Question 73 :
There is a depression in the surface of the liquid in a capillary when :<br/>
Question 74 :
An open vessel at $27^o$C is heated until two fifth of the air(assumed as an ideal gas) in it has escaped from the vessel. Assuming that the volume of the vessel remains constant, the temperature at which the vessel has been heated is:
Question 75 :
1 mol $<br/>{\text{CO}}_{\text{2}} <br/>$ ocupies 0.4 lit at 27$<br/>^\circ {\text{C}}<br/>$ and 40 atm. Calculate the compressibility factor:<br/>
Question 76 :
An open vessel at $27^{0}C$ is heated until $(3/5)^{th}$ of the air in it has been expelled. Assuming that the volume of the vessel remains constant then:
Question 77 :
The pressure required to liquefy a gas at the critical temperature is called
Question 78 :
Write true or false for the statement. Rewrite the false statements correctly.<br/>The intermolecular space in gas is almost negligible.
Question 79 :
Equal masses of methane and oxygen are mixed in an empty container at ${25}^{o}C$. The fraction of the total pressure exerted by oxygen is:
Question 80 :
Gram molar volume for a gas is always considered at ___ conditions.<br/>
Question 81 :
The density of mercury is $13.6\ g/{ cm }^{ 3 }$. Estimate the $b$ value.
Question 82 :
Which of the following postulates of kinetic theory of gases is not correct?
Question 83 :
The circulation of blood in human body supplies $O_{2}$ and releases $CO_{2}$. The concentration of $O_{2}$ and $CO_{2}$ is variable but on the average, $100\ mL$ blood contains $0.02\ g$ of $O_{2}$ and $0.08\ g\ CO_{2}$. The volume of $O_{2}$ and $CO_{2}$ at $1\ atm$ and body temperature $37^{\circ}C$, assuming $10\ L$ blood in human body is:
Question 84 :
Assertion: Critical temperature is the temperature at which the intermolecular attraction in gas molecules vanishes.
Reason: At critical point, the density of substance in gaseous and liquid states becomes same.
Question 85 :
In three beakers labeled as (A), (B) and (C), $100mL$ of water, $100mL$ of $1M$ solution of glucose in water and $100mL$ of $0.5M$ solution of glucose in water are taken respectively and kept at same temperature.<br>Which of the following statements is correct?
Question 86 :
In the rocket mentioned previously in which hydrogen is used as a fuel, calculate the volume of hydrogen used to produce $24 dm^3$ of water $(H_2O(g))$.
Question 87 :
The vapour pressure of water at $20^{o}C$ is $17.54mm Hg$. Then the vapour pressure of the water in the apparatus is lowered, decreasing the volume of the gas above the liquid to one half of its initial volume (temp. constant) is:
Question 88 :
How many litres of ammonia gas at S.T.P. would be needed to prepare $100\ mL$ of $2.5 M$ ammonium hydroxide solution?
Question 89 :
Rate of diffusion $\displaystyle r\propto \sqrt{\frac{1}{d_1}}$ or $\displaystyle r_1\propto \sqrt{\frac{1}{M_1}}$.<br>If true enter 1, else enter 0.<br>
Question 90 : Match the following:<br><table class="wysiwyg-table"><tbody><tr><td>List - I</td><td>List - II</td></tr><tr><td>A. Inversion temperature</td><td>(i) $a/ Rb$</td></tr><tr><td>B. Boyle's temperature</td><td>(ii) $8a/ 27Rb$</td></tr><tr><td>C. Critical temperature</td><td>(iii) $2a/ Rb$</td></tr></tbody></table>
Question 91 :
What volume of $0.1N$ $H{NO}_{3}$ solution can be prepared from $6.3g$ of $H{NO}_{3}$?
Question 92 :
If the atomic weight of carbon were set at 24 amu, the value of the Avogadro constant would be:
Question 93 :
At the same temperature and pressure two identical balloons were filled with methane and sulphur dioxide. If sulphur dioxide escaped at the rate of 100 $ml/ sec$, the methane would escape at the rate of:
Question 94 :
Average kinetic energy of a gas (Molar mass = 4) at "T/2" Kelvin is $8 \times 10^8$ ergs. RMS velocity of the gas at "T/2" Kelvin will be ______ cm/sec.
Question 95 :
If $Z$ is a compressibility factor, van der Waals equation at low pressure can be written as :
Question 97 :
20 mL of a sample of $H_2O_2$ gives 400 mL oxygen measured at NTP. The sample should be labeled as:
Question 100 : <span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">Match List I and List II</p><b><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span></b><p class="wysiwyg-text-align-left">List-I List-II</p><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">a) Barometer e) Charles law</p><p class="wysiwyg-text-align-left"><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">b) specific gas constant f) </span></span><i>Jmole</i>$^{-1}$<em>K</em>$^{-1}$</p><span class="wysiwyg-font-size-xx-small"><span class="wysiwyg-font-size-xx-small"></span></span><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small"></span></span><p class="wysiwyg-text-align-left">c) gas thermometer g) Boyels law</p><p><span class="wysiwyg-font-size-small"><span class="wysiwyg-font-size-small">d) universal gas constant h) </span></span><em>JKg</em>$^{-1}$<em>K</em>$^{-1}$</p>
Question 101 :
20 L of $SO_2$ diffuses through a porous partition in 60 seconds. Volume of $O_2$diffuse under similar conconditionsin 30 seconds will be :
Question 102 :
Three footballs are respectively filled with nitrogen, hydrogen and helium. If the leaking of the gas occurs with time from the filling hole, then the ratio of the rate of leaking of gases $(r_{N_2}: r_{H_2} : r_{He} )$ from three footballs (in equal time interval) is:
Question 104 :
Consider the following statement regarding Maxwell's distribution of velocities. The correct statement(s) is/are :
Question 105 :
The average velocity of an ideal gas molecule at $27^{\circ}\! C$ is $0.3 \: m \: s^{-1}$. The average velocity at $927^{\circ}\! C$ will be<br>
Question 107 :
If the gases are non-ideal and after 100% dissociation total pressure is greater than $4atm$, then:
Question 108 :
What are the partial pressure of each gas if A student performing an experiment has a bulb containing $14$ g of ${N}_{2}$, $64$ g of ${O}_{2}$, $8 $ g of $He$, and $35 $ g of ${Cl}_{2}$, at a total pressure of $380 $ torr?<br/>
Question 109 :
A mixture of hydrogen and helium is prepared such that the number of wall collisions per unit time by molecules of each gas is the same. Which gas has the higher concentration?
Question 110 :
At very high pressures, the compressibility factor of one mole of a gas is given by :
Question 111 :
A 4:1 molar mixture of $He$ and $CH_4$ is contained in a vessel at 20 $bar$ pressure. Due to a hole in the vessel, the gas mixture leaks out. What is the composition ratio of the mixture effusing out initially?<br/>
Question 112 :
The density of steam at $27^oC$ and $8.314\times10^4$ pascal is 0.8 Kg $m^3$. The compressibility factor would be:<br/>
Question 113 :
Pressure remaining the constant, the volume of a given mass of ideal gas increases for every degree centigrade rise in temperature by a definite fraction of its volume at:
Question 114 :
A football bladder contains equimolar proportions of $H_2$ and $O_2$. The composition by mass of the mixture effusion out of punctured football is in the ratio $(H_2:O_2)$:
Question 115 :
At very low temperatures, He can deviate from its ideal gas behavior
Question 116 :
Van der Waals' real gas, acts as an ideal gas at which condition?
Question 117 :
When a liquid that is immiscible with water was steam distilled at $95.2^o$C at a total pressure of $99.652$ kPa, the distillate contained $1.27$ g of the liquid per gram of water. What will be the molar mass of the liquid if the vapour pressure of water is $85.140$ kPa at $95.2^o$C?<br/>
Question 119 : The given table shows properties of four cells systems A, B, C and D. The maximum rate of inward diffusion of water will be observed in which of these systems?<br><table class="wysiwyg-table"><tbody><tr><td>System</td><td>Intracellular <br>concentration <br>of water </td><td>Extracellular<br>concentration <br>of water</td></tr><tr><td>A</td><td>0.09 M</td><td>0.11 M</td></tr><tr><td>B</td><td>0.2 M</td><td>0.5 M</td></tr><tr><td>C</td><td>0.05 M</td><td>0.6 M</td></tr><tr><td>D</td><td>0.03 M</td><td>0.7 M</td></tr></tbody></table>
Question 120 :
Which pair of the gaseous species diffuses through a small jet with the same rate of diffusion at same $P$ and $T$?
Question 121 :
If $\eta_{1}$ and $\eta_{2}$ are the coefficients of viscosity of two liquids $d_{1}$ and $d_{2}$ their densities and $t_{1}$ and $t_{2}$ the flow times in Ostwald viscometer, then:
Question 122 :
The correct order of normal boiling points of $O_2, N_2, NH_3$ and $ CH_4$ for whom the values of vander waals constant '$a$' are 1.360, 1.390, 4.170 and 2.253 L$^2$ atm. mol$^{-2}$ respectively is:
Question 123 :
At constant volume, for a fixed number of mole of a gas, the pressure of the gas increases with rising of temperature due to:<br/>
Question 124 :
The deviation from the ideal gas behaviour of a gas can be expressed as
Question 125 :
Assertion: The critical temperature of $CO_2$ is 304 K, it cannot be liquefied above 304 K.
Reason: At a certain temperature, volume $\propto \dfrac{1}{\text {pressure}}$.
Question 126 :
Which of the following solution in water possesses the lowest vapour pressure?
Question 127 :
At $27^0C$ if temperature of $1 mol$ of gas is increased by $50^0C$ the % change in kinetic energy of system is:
Question 128 :
$2$ grams of $H_{2}$ diffuses in $10$ minutes. The weight (in $g$) of $O_{2}$ that can diffuse from the same container in the same time under similar conditions is:
Question 129 : A $200\ mL$ flask contains oxygen at $200$ trim $Hg$ and a $ 300\ mL$ flask contains neon at $100$ $mm \:Hg$. The two flasks are connected so that each gas fills their combined volumes. What is the partial pressure of neon in the final mixture? <div><br/><div>(Assuming no change in temperature).</div></div>
Question 130 :
$6 \times 10^{22}$ gas molecules each of mass $10^{-24}$ kg are taken in a vessel of 10 litres. What is the pressure exerted by gas molecules if the average velocity of the gas molecules is $92.62$ m/sec?
Question 131 :
The compressibility factor of a gas is greater than unity at STP. Therefore :<br/>
Question 133 :
A steel vessel of capacity 22.4 litre contains 2 g of hydrogen, 8g of oxygen and 22g of carbon dioxide at a temperature of ${0^o}$C. The total pressure of the gas is:
Question 134 :
An ideal gas at pressure $P_0$ in a vessel. If the masses of all the molecules are halved and their RMS speeds doubled, the resulting pressure P will be:<br/>
Question 135 : If the density of vapours of a substance of molar mass 18 gm/mole at 1 atm pressure and 500 K is $0.36$ kg m$^{-3}$, then the value of Z for the vapours is:<div>[Take R=0.082 L atm]</div>
Question 136 :
Assertion: Compressibility factor $(Z)$ is the ratio of actual molar volume of a gas to the molar volume of it, if it were an ideal gas at that temperature and pressure.
Reason: At high pressure all the gases have $Z<1$ and can be easily compressed.
Question 137 :
Assertion: Decrease in the vapour pressure of water by adding $1$ mol of sucrose to one jg of water is higher to that produced by adding $1$ mol of urea to the same quantity of water at the same temperature.
Reason: Molecular mass of sugar is less than that of urea.
Question 138 :
Equal masses of ${SO_2}$ and ${O_2}$ are kept in a vessel at ${27 ^0}$ C.The total pressure is 2 atm. The partial pressure of $ {SO_2}$ (in atm) is:
Question 140 :
If the gas inside the vessel had molecular weight 9 times the gas in the previous example and area of orifice was doubled and temperature maintained at 4T, time required for pressure to fall to 1/e times of its initial value would be (t = answer of previous option)<br>
Question 141 :
The ratio between kinetic energies of 16 g of $O_2$ and 28 g of $N_2$ respectively at 300 K will be?
Question 142 :
Which one of the following equations represents the variation of viscosity coefficient $(\eta)$ with temperature $(T)$?
Question 143 :
A commercial cylinder contains $\displaystyle 6.91m^{3}$ of $O_{2}$ at 15M Pa and $21^{\circ}$C.the cricital constants for $O_{2}$ are $T_{c}$=-$126^{\circ}C,P_{c}=50$ bar.Determine the reduced pressure and reduced temperature for $O_{2}$under these conditions:
Question 144 :
The RMS velocity of hydrogen is $\sqrt 7$ times the RMS velocity of nitrogen. If $T$ is the temperature of gas, then:
Question 145 :
If the average velocity of $N_2$ molecules is $0.3\space m/sec$ at $27^{\small\circ}C$, then the velocity of $0.6\space m/sec$ will take place at :
Question 146 :
Certain amount oxygen gas was passed are heated carbon, $2C(s)+O_{2}(g) \rightarrow 2C(g)$ ratio of rate of effusion of $CO$ to $O_{2}$ after $80\%$ of $O_{2}$ gas which was added converted $CO(g)$.
Question 147 :
Given are the values of their van der Waal's constant 'a'. Arrange the following gases in the order of their expected liquification pressure at a temperature T. T is below the critical point of all the gases.<br/>Gas $CH_{4}$ $Kr $ $N_{2}$ $Cl_{2}$<br/>'a'($atmL^{2}.mol^{-1}$) 2.283 2.439 1.408 6.579
Question 148 :
If for gas critical parameters are $P_c = 2atm, T_c = 47^oC$, then approximate value of $V_c$ will be:
Question 149 :
Four 1L flasks are separately filled with the gases hydrogen, helium, oxygen and ozone at the same temp and pressure.The ratio of total no. of atoms of these gases present in the different flasks would be:<br>
Question 150 :
The compressibility factor Z closer to the value calculated by neglecting attractive forces in van der Waal's gas is :
