NEET Chemistry States of Matter / पदार्थ की अवस्थाएँ - गैस एवं द्रव Question Bank

done Self Evaluation Test - States of Matter Total Questions - 60

• question_answer1)
  Densities of two gases are in the ratio 1:2 and their temperatures are in the ratio 2:1 then the ratio of their respective pressures is
  A)
  1:1                    done clear
  B)
  1:2    done clear
  C)
  2:1                    done clear
  D)
  4:1 done clear
  View Solution play_arrow

• question_answer2)
  Which of the following volume (V) - temperature (T) plots represents the behaviour of one mole of an ideal gas at one atmospheric pressure?
  A)
             done clear
  B)
  done clear
  C)
  done clear
  D)
    done clear
  View Solution play_arrow

• question_answer3)
  Which gas shows real behaviour?
  A)
  \[16g\,{{O}_{2}}\] at 1 atm and 273 K occupies 11.2L done clear
  B)
  \[1g\,{{H}_{2}}\]in 0.5 L flask exerts pressure of 24.63 atm at 300 K done clear
  C)
  1 mole \[N{{H}_{3}}\] at 300 K and 1 atm occupies volume 22.4 L done clear
  D)
  5.6 L of \[C{{O}_{2}}\]at 1 atm and 273 K is equal to 11 g done clear
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• question_answer4)
  For a real gas (mol. mass =60) if density at critical point is \[0.80g/c{{m}^{3}}\] and its \[{{T}_{c}}=\frac{4\times {{10}^{5}}}{821}K\], then van der waals' constant a (in atm\[{{L}^{2}}mo{{l}^{-2}}\]) is
  A)
  \[0.3375\] done clear
  B)
  \[3.375\] done clear
  C)
  \[1.68\]                          done clear
  D)
  \[0.025\] done clear
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• question_answer5)
  600 c.c. of a gas at a pressure of 750 mm of Hg is compressed to 500 c.c. Taking the temperature to remain constant, the increase in pressure, is
  A)
  150 mm of Hg                done clear
  B)
  250 mm of Hg done clear
  C)
  350 mm of Hg                done clear
  D)
  450 mm of Hg done clear
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• question_answer6)
  The volume of 0.0168 mol of \[{{O}_{2}}\] obtained by decomposition of \[KCl{{O}_{3}}\] and collected by displacement of water is 428 mL at a pressure of 754 mm Hg at\[25{}^\circ C\]. The pressure of water vapour at \[25{}^\circ C\] is
  A)
  18 mmHg          done clear
  B)
  20 mmHg done clear
  C)
  22 mmHg          done clear
  D)
  24 mmHg. done clear
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• question_answer7)
  Three different gases X, Y and Z of molecular masses 2, 16 and 64 were enclosed in a vessel at constant temperature till equilibrium is reached. Which of the following statement is correct?
  A)
  Gas Z will be at the top of the vessel done clear
  B)
  Gas Y will be at the top of the vessel done clear
  C)
  Gas Z will be at the bottom and X will be at the top done clear
  D)
  Gases will form homogenous mixture done clear
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• question_answer8)
  When 2 g of a gas A is introduced into an evaluated flask kept at \[25{}^\circ C\], the pressure is found to be one atmosphere. If \[3gm\] of another gas B is then added to the same flask, the total pressure becomes 1.5 atm. Assuming ideal gas behaviour, calculate the ratio of the molecular weights \[{{M}_{A}}:{{M}_{B}}.\]      
  A)
  1:3                                done clear
  B)
  1:1   done clear
  C)
  2:1                               done clear
  D)
  3:1 done clear
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• question_answer9)
  When does a gas deviate the most from its ideal behaviour?
  A)
  At low pressure and low temperature done clear
  B)
  At low pressure and high temperature done clear
  C)
  At high pressure and low temperature done clear
  D)
  At high pressure and high temperature done clear
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• question_answer10)
  The initial volume of a gas cylinder is 750.0 mL. If the pressure of gas inside the cylinder changes from 840.0 mm Hg to 360.0 mm Hg, the final volume the gas will be:
  A)
  1.750 L             done clear
  B)
  3.60 L done clear
  C)
  4.032 L             done clear
  D)
  7.50 L done clear
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• question_answer11)
  Which of the following assumption of kinetic molecular theory states that gases do not have fixed shape?
  A)
  Particles of a gas move in all possible directions in straight line. done clear
  B)
  Particles of a gas are always in constant and random motion. done clear
  C)
  Total energy of molecules before and after the collision remains same. done clear
  D)
  None of these done clear
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• question_answer12)
  Which one of the following is the wrong assumption of kinetic theory of gases?
  A)
  Momentum and energy always remain conserved. done clear
  B)
  Pressure is the result of elastic collision of molecules with the container's wall. done clear
  C)
  Molecules are separated by great distances compared to their sizes. done clear
  D)
  All the molecules move in straight line between collision and with same velocity. done clear
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• question_answer13)
  Equal masses of methane and oxygen are mixed in an empty container at \[25{}^\circ C\]. The fraction of the total pressure exerted by oxygen is
  A)
  \[1/2\]                            done clear
  B)
  \[2/3\] done clear
  C)
  \[\frac{1}{3}\times \frac{273}{298}\]                done clear
  D)
  \[1/3\] done clear
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• question_answer14)
  A He atom at 300 K is released from the surface of the earth to travel upwards. Assuming that it undergoes no collision with other molecules, how high will it be before coming to the rest?
  A)
  9.53 m              done clear
  B)
  95.3 m done clear
  C)
  953 m                           done clear
  D)
  \[9.53\times {{10}^{4}}m\] done clear
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• question_answer15)
  Sulphur dioxide and oxygen were allowed to diffuse through a porous partition. \[20d{{m}^{3}}\] of \[S{{O}_{2}}\] diffuses through the Dorous partition in 60 seconds. The volume of \[{{O}_{2}}\] in \[d{{m}^{3}}\] which diffuses under the similar condition in 30 seconds will be (atomic mass of sulphur = 32 u):
  A)
  7.09                  done clear
  B)
  14.1   done clear
  C)
  10.0                  done clear
  D)
  28.2 done clear
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• question_answer16)
  For 1 mol of an ideal gas at a constant temperature T, the plot of log P against log V is a (P: Pressure, V:Volume)
  A)
  Straight line parallel to x-axis. done clear
  B)
  Straight line with a negative slope. done clear
  C)
  Curve starting at origin. done clear
  D)
  Straight line passing through origin. done clear
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• question_answer17)
  The value of van der waals constant 'a' for gases \[{{O}_{2}},{{N}_{2}},N{{H}_{3}}\] and \[C{{H}_{4}}\] are 1.360, 1.390, 4.170 and 2.253 \[litr{{e}^{2}}\]atom \[mo{{l}^{-2}}\]respectively. The gas which can most easily be liquefied is:
  A)
  \[{{O}_{2}}\]                done clear
  B)
  \[{{N}_{2}}\]   done clear
  C)
  \[N{{H}_{3}}\]             done clear
  D)
  \[C{{H}_{4}}\] done clear
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• question_answer18)
  A manifestation of surface tension is:
  A)
  rise of liquid in a capillary tube done clear
  B)
  spherical shape of liquid drops done clear
  C)
  upward movement of water in soils done clear
  D)
  All the above done clear
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• question_answer19)
  A bubble of the gas released at the bottom of a lake increases to eight times the original volume when it reaches at the surface. Assuming that the atmospheric pressure is equivalent to pressure exerted by a column of water 10m high, what is the depth of the lake
  A)
  80 m                 done clear
  B)
  90 m done clear
  C)
  10 m                 done clear
  D)
  70 m done clear
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• question_answer20)
  Two vessels containing gases A and B are interconnected as shown in the figure. The stopper is opened, the gases are allowed to mix homogeneously. The partial pressures of A and B in the mixture will be, respectively
  A)
  8 and 5 atom       done clear
  B)
  9.6 and 4 atm done clear
  C)
  4.8 and 2 atm                done clear
  D)
  6.4 and 4 atm done clear
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• question_answer21)
  A neon-dioxygen mixture contains \[70.6g\,O{{  }_{2}}\] and 167.5 g neon. If pressure of the mixture of gases in the cylinder is 25 bar. What is the partial pressure of \[{{O}_{2}}\] and Ne in the mixture respectively?
  A)
  5.25 bar, 10 bar    done clear
  B)
  19.75 bar, 5.25 bar done clear
  C)
  19.75 bar, 10 bar            done clear
  D)
  5.25 bar, 19.75 bar done clear
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• question_answer22)
  When \[C{{O}_{2}}(g)\] is passed over red hot coke it partially gets reduced to \[CO(g)\]. Upon passing 0.5 L of \[C{{O}_{2}}(g)\] over red hot coke, the total volume of the gases increased to 700 mL. The composition of the gaseous mixture at STP is                 
  A)
  \[C{{O}_{2}}=300mL;CO=400mL\] done clear
  B)
  \[C{{O}_{2}}=0.0mL;CO=700mL\] done clear
  C)
  \[C{{O}_{2}}=200mL;CO=500mL\] done clear
  D)
  \[C{{O}_{2}}=350mL;CO=350mL\] done clear
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• question_answer23)
  Which of the following is not an assumption of the kinetic theory of gases?
  A)
  Gas particles have negligible volume. done clear
  B)
  A gas consists of many identical particles which are in continual motion. done clear
  C)
  At high pressure, gas particles are difficult to compress. done clear
  D)
  Collisions of gas particles are perfectly elastic. done clear
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• question_answer24)
  Two vessels of volumes 16.4 L and 5 L contain two ideal gases of molecular existence at the respective temperature of \[27{}^\circ C\] and \[227{}^\circ C\] and exert 1.5 and 4.1 atmospheres respectively. The ratio of the number of molecules of the former to that of the later is
  A)
  2                      done clear
  B)
  1      done clear
  C)
  \[\frac{1}{2}\]                           done clear
  D)
  \[\frac{1}{3}\] done clear
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• question_answer25)
  If \[{{10}^{-4}}d{{m}^{3}}\] of water is introduced into a \[1.0d{{m}^{3}}\] flask at 300 K, how many moles of water are in the vapour phase when equilibrium is established?             (Given: Vapour pressure of \[{{H}_{2}}O\] at 300 K is 3170 Pa; \[R=8.314\,J{{K}^{-1}}mo{{l}^{-1}}\])
  A)
  \[5.56\times {{10}^{-3}}mol\]    done clear
  B)
  \[1.53\times {{10}^{-2}}mol\] done clear
  C)
  \[4.46\times {{10}^{-2}}mol\]   done clear
  D)
  \[1.27\times {{10}^{-3}}mol\] done clear
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• question_answer26)
  At STP, a container has 1 mole of He, 2 mole Ne, 3 mole \[{{O}_{2}}\] and 4 mole\[{{N}_{2}}\]. without changing total pressure if 2 mole of \[{{O}_{2}}\] is removed. The partial pressure of \[{{O}_{2}}\] will be decreased by:
  A)
  26%                              done clear
  B)
  40% done clear
  C)
  58.33%             done clear
  D)
  66.66% done clear
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• question_answer27)
  A mixture of Ne and Ar kept in a closed vessel at 250 K has a total \[K.E.=3kJ\]. The total mass of Ne and Ar is 30 g. Find mass % of Ne in gaseous mixture at 250 K.
  A)
  61.63                done clear
  B)
  38.37 done clear
  C)
  50                                 done clear
  D)
  28.3 done clear
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• question_answer28)
  The temperature at which oxygen molecules have the same root mean square speed as helium atoms have at 300 K is: (Atomic masses:\[He=4u,\text{ O}=16u\])
  A)
  300 K                done clear
  B)
  600 K done clear
  C)
  1200 K              done clear
  D)
  2400 K done clear
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• question_answer29)
  By how many folds the temperature of a gas would increase when the root mean square velocity of the gas molecules in a container of fixed volume is increased from \[5\times {{10}^{4}}cm/s\] to \[10\times {{10}^{4}}cm/s\]?
  A)
  Two                              done clear
  B)
  Three done clear
  C)
  Six                                done clear
  D)
  Four done clear
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• question_answer30)
  A high- altitude balloon is filled with \[1.41\times {{10}^{4}}L\] of hydrogen at a temperature of \[21{}^\circ C\] and a pressure of 745 torr. What is the volume of the balloon at a height of 20 km, where the temperature is \[-48{}^\circ C\] and the pressure is 63.1 torr?
  A)
  \[1.247\times {{10}^{5}}L\]     done clear
  B)
  \[1.66\times {{10}^{5}}L\] done clear
  C)
  \[1.66\times {{10}^{4}}L\]        done clear
  D)
  None of these done clear
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• question_answer31)
  A spherical balloon of \[21\text{ }cm\] diameter is to be filled with \[{{H}_{2}}\] at NTP from a cylinder containing the gas at 20 atm at \[27{}^\circ C\]. The cylinder can hold 2.82 L of water at NTP. The number of balloons that can be filled up is
  A)
  15                     done clear
  B)
  10    done clear
  C)
  20                                 done clear
  D)
  25 done clear
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• question_answer32)
  Equal volumes of the gases which do not react together are confined in separate vessels. The pressure is 200 mm and 400 mm of Hg respectively. If the two gases are mixed together what will be the pressure of the resulting mixture (temperature remaining constant)
  A)
  400 mm            done clear
  B)
  \[\sqrt{400}\,mm\] done clear
  C)
  300 mm            done clear
  D)
  200 mm done clear
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• question_answer33)
  In case of CO and \[C{{H}_{4}}\] curve goes to minima then increases with increase in pressure but in case of \[{{H}_{\text{2}}}\] and He the curve is linear because:
  A)
  Intermolecular interactions tor \[{{H}_{2}}\] and He are very low. done clear
  B)
  Molecular size or atomic size for \[{{H}_{2}}\] and He is small. done clear
  C)
  Both [a] and [b] done clear
  D)
  Neither [a] nor [b] done clear
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• question_answer34)
  Following table represents critical temperature of some gases. Arrange these gases in their increasing order of liquifaction.

  Gas	\[{{H}_{2}}\]	He	\[{{N}_{2}}\]	\[{{O}_{2}}\]
  \[{{T}_{c}}/K\]	33.2	5.3	126	154.2

  A)
  \[He<{{N}_{2}}<{{H}_{2}}<{{O}_{2}}\] done clear
  B)
  \[{{H}_{2}}<He<{{N}_{2}}<{{O}_{2}}\] done clear
  C)
  \[He<{{H}_{2}}<{{N}_{2}}<{{O}_{2}}\]       done clear
  D)
  \[{{O}_{2}}<{{N}_{2}}<{{H}_{2}}<He\] done clear
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• question_answer35)
  \[\alpha \], v and u represent most probable velocity, average velocity and root mean square velocity respectively of a gas at a particular temperature. The correct order among the following is
  A)
  \[u>v>\alpha \]             done clear
  B)
  \[v>u>\alpha \] done clear
  C)
  \[\alpha >u>v\]             done clear
  D)
  \[u>\alpha >v\] done clear
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• question_answer36)
  van der Waal's equation for a gas is stated as, \[P=\frac{nRT}{V-nb}-a{{\left( \frac{n}{V} \right)}^{2}}.\] This equation reduces to the perfect gas equation, \[P=\frac{nRT}{V}\]
  A)
  temperature is sufficient high and pressure is low. done clear
  B)
  temperature is sufficient low and pressure is high. done clear
  C)
  both temperature and pressure are very high. done clear
  D)
  both temperature and pressure are very low. done clear
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• question_answer37)
  What is the value of X in \[{}^\circ C\] for given volume vs temperature curve?
  A)
  \[0{}^\circ C\]                           done clear
  B)
  \[273.15{}^\circ C\] done clear
  C)
  \[-273.15{}^\circ C\]                  done clear
  D)
  \[300{}^\circ C\] done clear
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• question_answer38)
  When a sample of gas is compressed at constant temperature from 15 atm to 60 atm, its volume changes from 76 \[c{{m}^{3}}\] to 20.5 \[c{{m}^{3}}\]. Which of the following statements are possible explanations of this behaviour?          (1) The gas behaves non-ideally (2) The gas dimerises (3) The gas is adsorbed into the vessel walls
  A)
  1, 2 and 3         done clear
  B)
  1 and 2 only done clear
  C)
  2 and 3 only      done clear
  D)
  1 only done clear
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• question_answer39)
  What is the ratio of pressure of the 2 g of hydrogen to that of 4 g of helium at temperature of \[298\text{ }K,\text{ }20mL\] volume? (consider the ideal behaviour)
  A)
  1:2                                done clear
  B)
  2:1   done clear
  C)
  1:1                                done clear
  D)
  2:2 done clear
  View Solution play_arrow

• question_answer40)
  A drop of oil is placed on the surface of water. Which of the following statement is correct?
  A)
  It will remain on it as a sphere done clear
  B)
  It will spread as a thin layer done clear
  C)
  It will be partly as spherical droplets and partly as thin film done clear
  D)
  It will float as a distorted drop on the water surface done clear
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• question_answer41)
  The correct order of viscosity of the following liquids will be
  A)
  Water < methyl alcohol < dimethyl ether < glycerol done clear
  B)
  methyl alcohol < glycerol < water < dimethyl ether done clear
  C)
  dimethyl ether < methyl alcohol < water < glycerol done clear
  D)
  glycerol < dimethyl ether < water < methyl alcohol done clear
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• question_answer42)
  At \[0{}^\circ C\] and one atm pressure, a gas occupies 100 cc. If the pressure is increased to one and a half-time and temperature is increased by one- third of absolute temperature, then final volume of the gas will be:
  A)
  80 cc                 done clear
  B)
  88.9 cc done clear
  C)
  66.7 cc              done clear
  D)
  100 cc done clear
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• question_answer43)
  At \[27{}^\circ C\] a sample of ammonia gas exerts a pressure of 5.3 atm. What is the pressure when the volume of the gas is reduced to one-tenth of the original value at the same temperature?
  A)
  0.53 atm           done clear
  B)
  5.3 atm done clear
  C)
  53 atm              done clear
  D)
  None of these done clear
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• question_answer44)
  The most probable speed of 8 g of \[{{H}_{2}}\] is \[200\text{ }m{{s}^{-1}}\]. Average kinetic energy (neglect rotational and vibrational energy) of \[{{H}_{2}}\] gas is:
  A)
  480 J                done clear
  B)
  240 J done clear
  C)
  120 J                done clear
  D)
  none of these done clear
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• question_answer45)
  Oxidation of succinate ion produces ethylene and carbon dioxide gases. On passing 0.2 Faraday electricity through an aqueous solution of potassium succinate, the total volume of gases (at both cathode and anode) at STP (1 atm and 273 K) is:
  A)
  8.96 L               done clear
  B)
  4.48 L done clear
  C)
  6.72 L                           done clear
  D)
  2.24 L done clear
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• question_answer46)
  A compressed cylinder of gas contains \[1.50\times {{10}^{3}}g\] of \[{{N}_{2}}\] gas at a pressure of \[2.0\times {{10}^{7}}\] Pa and a temperature of \[17.1{}^\circ C\]. What volume of gas has been released into the atmosphere if the final pressure in the cylinder is \[1.80\times {{10}^{5}}\] Pa? Assume ideal behaviour and that the gas temperature is unchanged.
  A)
  1264 L              done clear
  B)
  126 L done clear
  C)
  12600 L            done clear
  D)
  45 L done clear
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• question_answer47)
  Dimethyl ether decomposes as \[C{{H}_{3}}OC{{H}_{3}}\left( g \right)\xrightarrow{{}}C{{H}_{4}}\left( g \right)+CO\left( g \right)+{{H}_{2}}\left( g \right)\] when \[C{{H}_{3}}OC{{H}_{3}}\] decomposes to 20% extent under certain conditions, what is the ratio of diffusion of pure \[C{{H}_{3}}OC{{H}_{3}}\] with methane?
  A)
  0.59:1                           done clear
  B)
  1.18:1 done clear
  C)
  2.36:1                           done clear
  D)
  1.77:1 done clear
  View Solution play_arrow

• question_answer48)
  Air entering the lungs ends up in tiny sacs called alveoli. From the alveoli, the oxygen diffuses into the blood. The average radius of the alveoli is 0.0050 cm and the air inside contains 14 per cent oxygen. Assuming that the pressure in the alveoli is 1.0 atm and the temperature is \[37{}^\circ C\], calculate the number of oxygen molecules in one of the alveoli,               
  A)
  \[6\times {{10}^{13}}\]            done clear
  B)
  \[{{10}^{24}}\] done clear
  C)
  \[1.7\times {{10}^{22}}\]          done clear
  D)
  \[1.7\times {{10}^{12}}\] done clear
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• question_answer49)
  A graph is plotted between \[P{{V}_{m}}\] (along Y-axis) and P (along X-axis) at \[27{}^\circ \] (\[{{V}_{m}}\]being the molar volume of an ideal gas). The intercept of the graph at Y-axis is (\[R=0.082\text{ }atm\text{ }L{{K}^{-1}}mo{{l}^{-1}}\])
  A)
  \[22.4\text{ }atm\text{ }L\text{ }mo{{l}^{-1}}\] done clear
  B)
  \[24.6\text{ }atm\text{ }L\text{ }mo{{l}^{-1}}\] done clear
  C)
  \[24.6\text{ }atm\text{ }L{{K}^{-1}}mo{{l}^{-1}}\] done clear
  D)
  None of these done clear
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• question_answer50)
  A flask containing air (open to the atmosphere) is heated from 300 K to 500 K. The percentage of the air escaped into the atmosphere is
  A)
  16.6                  done clear
  B)
  40     done clear
  C)
  60                                 done clear
  D)
  20 done clear
  View Solution play_arrow

• question_answer51)
  Reducing the pressure from 1.0 atm to 0.5 atm would change the number of molecules in one mole of ammonia to
  A)
  25% of its initial value done clear
  B)
  50% of its initial value done clear
  C)
  75% of its initial value done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer52)
  For real gases van der Waals equation is written as \[\left( p+\frac{a{{n}^{2}}}{{{V}^{2}}} \right)(V-nb)=nRT\] where 'a' and 'b' are van der Waals constants. Two sets of gases are: (I) \[{{O}_{2}},C{{O}_{2}},{{H}_{2}}\] and He (II) \[C{{H}_{4}},{{O}_{2}}\] and \[{{H}_{2}}\] The gases given in set-I in increasing order of 'b' and gases given in set-II in decreasing order of 'a' are arranged below. Select the correct order from the following:
  A)
  \[(I)\,He<{{H}_{2}}<C{{O}_{2}}<{{O}_{2}}\,(II)\,C{{H}_{4}}>{{H}_{2}}>{{O}_{2}}\] done clear
  B)
  \[(I)\,{{O}_{2}}<He<{{H}_{2}}<C{{O}_{2}}(II)\,{{H}_{2}}>{{O}_{2}}>C{{H}_{4}}\,\] done clear
  C)
  \[(I)\,He<{{H}_{2}}<{{O}_{2}}<C{{O}_{2}}(II)\,C{{H}_{4}}>{{O}_{2}}>{{H}_{2}}\] done clear
  D)
  \[(I)\,{{H}_{2}}<{{O}_{2}}<He<C{{O}_{2}}(II)\,{{O}_{2}}>C{{H}_{4}}>{{H}_{2}}\] done clear
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• question_answer53)
  Which of the following statements are correct?

  (i) Hydrogen bonding is a special case of dipole - dipole interaction.

  (ii) Energy of hydrogen bond varies between 10 to \[100kJ\text{ }mo{{l}^{-1}}\].

  (iii) Hydrogen bonds are powerful force in determining the structure and properties of compounds like proteins, nucleic acids etc.

  (iv) Strength of the hydrogen bond is determined by the coulombic interaction between the lone-pair electrons of the electronegative atom of one molecule and the hydrogen atom of other molecule.

  A)
  (i) and (ii)           done clear
  B)
  (i), (ii) and (iii) done clear
  C)
  (ii), (iii) and (iv)                done clear
  D)
  All of these done clear
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• question_answer54)
  On a ship sailing in pacific ocean where temperature is \[23.4{}^\circ C\], a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches Indian ocean, where temperature is \[26.1{}^\circ C\]?    
  A)
  2.018 L             done clear
  B)
  2.8 L done clear
  C)
  3.5 L                             done clear
  D)
  1.5 L done clear
  View Solution play_arrow

• question_answer55)
  A bubble of air is underwater at temperature \[15{}^\circ C\]and the pressure 1.5 bar. If the bubble rises to the surface where the temperature is \[25{}^\circ C\] and the pressure is 1.0 bar, what will happen to the volume of the bubble?
  A)
  Volume will become greater by a factor of 1.6. done clear
  B)
  Volume will become greater by a factor of 1.1. done clear
  C)
  Volume will become smaller by a factor of 0.70. done clear
  D)
  Volume will become greater by a factor of 2.5. done clear
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• question_answer56)
  Cyclopropane and oxygen at partial pressures 170 torr and 570 torr respectively are mixed in a gas cylinder. What is the ratio of the number of moles of cyclopropane to the number of moles of oxygen \[(n{{C}_{3}}{{H}_{6}}/n{{O}_{2}})\]
  A)
  \[\frac{170\times 42}{570\times 32}=0.39\] done clear
  B)
  \[\frac{170}{42}/\left( \frac{170}{42}+\frac{570}{32} \right)\approx 0.19\] done clear
  C)
  \[\frac{170}{740}=0.23\] done clear
  D)
  \[\frac{170}{570}=0.30\] done clear
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• question_answer57)
  There are three closed containers in which equal amount of the gas are filled. If all the containers are placed at the same temperatures, then find the incorrect options -
  A)
  Pressure of the gas is minimum in (III) container done clear
  B)
  Pressure of the gas is equal in I and II container done clear
  C)
  Pressure of the gas is maximum in (I) done clear
  D)
  The ratio of pressure in II and III container is 4:3 done clear
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• question_answer58)
  Helium atom is two times heavier than a hydrogen molecule at. 298K. The average KE of helium is
  A)
  2 times of \[{{H}_{2}}\] molecule done clear
  B)
  same as that of \[{{H}_{2}}\] molecule done clear
  C)
  4 times that of hydrogen molecule done clear
  D)
  \[\frac{1}{2}\] that of \[{{H}_{2}}\] molecule done clear
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• question_answer59)
  A 3 : 2 molar mixture of \[{{N}_{2}}\] and CO is present in a vessel at 500 bar pressure. Due to hole in the vessel, the gas mixture leaks out. The composition of mixture effusing out initially is
  A)
  \[{}^{n}{{N}_{2}}:{}^{n}CO::1:2\]    done clear
  B)
  \[{}^{n}{{N}_{2}}:{}^{n}CO::6:1\] done clear
  C)
  \[{}^{n}CO:{}^{n}{{N}_{2}}::1:2\]    done clear
  D)
  \[{}^{n}CO:{}^{n}{{N}_{2}}::2:3\] done clear
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• question_answer60)
  The molecular velocities of two gases at the same temperature are \[{{u}_{1}}\] and \[{{u}_{2}}\] and their masses are \[{{m}_{1}}\] and \[{{m}_{2}}\] respectively. Which of the following expressions are correct?
  A)
  \[\frac{{{m}_{1}}}{u_{1}^{2}}=\frac{{{m}_{2}}}{u_{2}^{2}}\]                   done clear
  B)
  \[{{m}_{1}}{{u}_{1}}={{m}_{2}}{{u}_{2}}\] done clear
  C)
  \[\frac{{{m}_{1}}}{{{u}_{1}}}=\frac{{{m}_{2}}}{{{u}_{1}}}\]                      done clear
  D)
  \[{{m}_{1}}u_{1}^{2}={{m}_{2}}u_{2}^{2}\] done clear
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