JEE Main & Advanced Chemistry States of Matter / पदार्थ की अवस्थाएँ - गैस एवं द्रव Question Bank

done Critical Thinking Total Questions - 22

• question_answer1)
  As the temperature is raised from \[{{20}^{o}}C\] to \[{{40}^{o}}C\] the average kinetic energy of neon atoms changes by a factor of which of the following                 [AIEEE 2004]
  A)
                  313/293                done clear
  B)
                  \[\sqrt{(313/293)}\] done clear
  C)
                  1/2         done clear
  D)
                  2 done clear
  View Solution play_arrow

• question_answer2)
  A gas is found to have a formula\[{{[CO]}_{x}}\]. If its vapour density is 70, the value of \[x\] is                  [DCE 2004]
  A)
                  2.5          done clear
  B)
                  3.0 done clear
  C)
                  5.0          done clear
  D)
                  6.0 done clear
  View Solution play_arrow

• question_answer3)
  Which of the given sets of temperature and pressure will cause a gas to exhibit the greatest deviation from ideal gas behavior              [DCE 2003]
  A)
                  \[{{100}^{o}}C\] and 4 atm           done clear
  B)
                  \[{{100}^{o}}C\] and 2 atm done clear
  C)
                  \[-{{100}^{o}}C\] and 4 atm         done clear
  D)
                  \[{{0}^{o}}C\] and 2 atm done clear
  View Solution play_arrow

• question_answer4)
  The molecular weight of \[{{O}_{2}}\] and \[S{{O}_{2}}\] are 32 and 64 respectively. If one litre of \[{{O}_{2}}\] at \[{{15}^{o}}C\] and 750 mm pressure contains 'N' molecules, the number of molecules in two litres of \[S{{O}_{2}}\] under the same conditions of temperature and pressure will be             [CBSE 1990; MNR 1991]
  A)
                  \[N/2\] done clear
  B)
                  N done clear
  C)
                  2N          done clear
  D)
                  4N done clear
  View Solution play_arrow

• question_answer5)
  What is the relationship between the average velocity (v), root mean square velocity (u) and most probable velocity a [AFMC 1994]
  A)
                  \[\alpha :v:u::1:1.128:1.224\] done clear
  B)
                  \[\alpha :v:u::1.128:1:1.224\] done clear
  C)
                  \[\alpha :v:u::1.128:1.224:1\] done clear
  D)
                  \[\alpha :v:u::1.124:1.228:1\] done clear
  View Solution play_arrow

• question_answer6)
  Consider the following statements :  For diatomic gases, the ratio \[{{C}_{p}}/{{C}_{v}}\] is equal to                 (1) 1.40 (lower temperature)                 (2) 1.66 (moderate temperature)                 (3) 1.29 (higher temperature)                 which of the above statements are correct
  A)
                  1, 2 and 3             done clear
  B)
                  1 and 2 done clear
  C)
                  2 and 3  done clear
  D)
                  1 and 3 done clear
  View Solution play_arrow

• question_answer7)
  The compressibility factor for an ideal gas is         [MP PET 2004]
  A)
                  1.5          done clear
  B)
                  1.0 done clear
  C)
                  2.0          done clear
  D)
                  \[\infty \] done clear
  View Solution play_arrow

• question_answer8)
  The compressibility factor of a gas is less than 1 at STP. Its molar volume \[{{V}_{m}}\] will be      [MP PET 2004]
  A)
                  \[{{V}_{m}}>\] 22.42       done clear
  B)
                  \[{{V}_{m}}<\]22.42 done clear
  C)
                  \[{{V}_{m}}=\]22.42        done clear
  D)
                  None done clear
  View Solution play_arrow

• question_answer9)
  If some moles of \[{{O}_{2}}\] diffuse in 18 sec and same moles of other gas diffuse in 45 sec then what is the molecular weight of the unknown gas         [CPMT 1988]
  A)
                  \[\frac{{{45}^{2}}}{{{18}^{2}}}\times 32\]              done clear
  B)
                  \[\frac{{{18}^{2}}}{{{45}^{2}}}\times 32\] done clear
  C)
                  \[\frac{{{18}^{2}}}{{{45}^{2}}\times 32}\]              done clear
  D)
                  \[\frac{{{45}^{2}}}{{{18}^{2}}\times 32}\] done clear
  View Solution play_arrow

• question_answer10)
  The ratio of rates of diffusion of \[S{{O}_{2}},\,{{O}_{2}}\] and \[C{{H}_{4}}\] is [BHU 1992]
  A)
                  \[1:\sqrt{2}:2\]  done clear
  B)
                  1 : 2 : 4 done clear
  C)
                  \[2:\sqrt{2}:1\]  done clear
  D)
                  \[1:2:\sqrt{2}\] done clear
  View Solution play_arrow

• question_answer11)
  If \[{{C}_{1}},\,{{C}_{2}},\,{{C}_{3}}......\]represent the speeds of \[{{n}_{1}},\,{{n}_{2}},\,{{n}_{3}}.....\] molecules, then the root mean square speed is  [IIT 1993]
  A)
                  \[{{\left( \frac{{{n}_{1}}C_{1}^{2}+{{n}_{2}}C_{2}^{2}+{{n}_{3}}C_{3}^{2}+.....}{{{n}_{1}}+{{n}_{2}}+{{n}_{3}}+.....} \right)}^{1/2}}\] done clear
  B)
            \[\frac{{{({{n}_{1}}C_{1}^{2}+{{n}_{2}}C_{2}^{2}+{{n}_{3}}C_{3}^{2}+.....)}^{1/2}}}{{{n}_{1}}+{{n}_{2}}+{{n}_{3}}+.....}\] done clear
  C)
  \[\frac{{{({{n}_{1}}C_{1}^{2})}^{1/2}}}{{{n}_{1}}}+\frac{{{({{n}_{2}}C_{2}^{2})}^{1/2}}}{{{n}_{2}}}+\frac{{{({{n}_{3}}C_{3}^{2})}^{1/2}}}{{{n}_{3}}}+......\] done clear
  D)
                  \[{{\left[ \frac{{{({{n}_{1}}{{C}_{1}}+{{n}_{2}}{{C}_{2}}+{{n}_{3}}{{C}_{3}}+....)}^{2}}}{({{n}_{1}}+{{n}_{2}}+{{n}_{3}}+....)} \right]}^{1/2}}\] done clear
  View Solution play_arrow

• question_answer12)
  50 ml of hydrogen diffuses out through a small hole from a vessel in 20 minutes. The time needed for 40 ml of oxygen to diffuse out is      [CBSE PMT 1994]
  A)
                  12 min   done clear
  B)
                  64 min done clear
  C)
                  8 min     done clear
  D)
                  32 min done clear
  View Solution play_arrow

• question_answer13)
  At what temperature will the average speed of \[C{{H}_{4}}\]molecules have the same value as \[{{O}_{2}}\] has at 300 K [CBSE PMT 1989]
  A)
                  1200 K   done clear
  B)
                  150 K done clear
  C)
                  600 K     done clear
  D)
                  300 K done clear
  View Solution play_arrow

• question_answer14)
  A sample of \[{{O}_{2}}\] gas is collected over water at \[{{23}^{o}}C\] at a barometric pressure of 751 mm Hg (vapour pressure of water at \[{{23}^{o}}C\] is 21 mm Hg). The partial pressure of \[{{O}_{2}}\] gas in the sample collected is       [CBSE PMT 1993]
  A)
                  21 mm Hg            done clear
  B)
                  751 mm Hg done clear
  C)
                  0.96 atm              done clear
  D)
                  1.02 atm done clear
  View Solution play_arrow

• question_answer15)
  In an experiment during the analysis of a carbon compound, 145 \[l\] of \[{{H}_{2}}\] was collected at 760 mm Hg pressure and \[{{27}^{o}}C\] temperature. The mass of \[{{H}_{2}}\] is nearly [MNR 1987]
  A)
                  10 g        done clear
  B)
                  12 g done clear
  C)
                  24 g        done clear
  D)
                  6 g done clear
  View Solution play_arrow

• question_answer16)
  The volume of 1 g each of methane \[(C{{H}_{4}})\], ethane \[({{C}_{2}}{{H}_{6}})\], propane\[({{C}_{3}}{{H}_{8}})\] and butane \[({{C}_{4}}{{H}_{10}})\] was measured  at  350  K  and  1 atm. What  is  the  volume  of butane   [NCERT 1981]
  A)
                  495 \[c{{m}^{3}}\]            done clear
  B)
                  600 \[c{{m}^{3}}\] done clear
  C)
                  900 \[c{{m}^{3}}\]            done clear
  D)
                  1700 \[c{{m}^{3}}\] done clear
  View Solution play_arrow

• question_answer17)
  The ratio of the rate of diffusion of helium and methane under identical condition of pressure and temperature will be [IIT 2005]
  A)
                  4              done clear
  B)
                  2 done clear
  C)
                  1              done clear
  D)
                  0.5 done clear
  View Solution play_arrow

• question_answer18)
  At what temperature in the celsius scale, V (volume) of a certain mass of  gas at \[{{27}^{o}}C\] will be doubled keeping the pressure constant           [Orissa 1993]
  A)
                  \[{{54}^{o}}C\]  done clear
  B)
                  \[{{327}^{o}}C\] done clear
  C)
                  \[{{427}^{o}}C\]                done clear
  D)
                  \[{{527}^{o}}C\] done clear
  View Solution play_arrow

• question_answer19)
  Pressure of a mixture of 4 g of \[{{O}_{2}}\] and 2 g of \[{{H}_{2}}\] confined in a bulb of 1 litre at \[{{0}^{o}}C\] is             [AIIMS 2000]
  A)
                  25.215 atm          done clear
  B)
                  31.205 atm done clear
  C)
                  45.215 atm          done clear
  D)
                  15.210 atm done clear
  View Solution play_arrow

• question_answer20)
  If pressure becomes double at the same absolute temperature on 2 L\[C{{O}_{2}}\], then the volume of \[C{{O}_{2}}\] becomes [AIIMS 1992]
  A)
                  2 L           done clear
  B)
                  4 L done clear
  C)
                  25 L done clear
  D)
                  1 L done clear
  View Solution play_arrow

• question_answer21)
  Volume of the air that will be expelled from a vessel of 300 \[c{{m}^{3}}\] when it is heated from \[{{27}^{o}}C\] to \[{{37}^{o}}C\] at the same pressure will be
  A)
                  310 \[c{{m}^{3}}\]            done clear
  B)
                  290 \[c{{m}^{3}}\] done clear
  C)
                  10 \[c{{m}^{3}}\] done clear
  D)
                  37 \[c{{m}^{3}}\] done clear
  View Solution play_arrow

• question_answer22)
  300 ml of a gas at \[{{27}^{o}}C\] is cooled to \[-{{3}^{o}}C\] at constant pressure, the final volume is [NCERT 1981, MP PMT 1992]
  A)
                  540 ml   done clear
  B)
                  135 ml done clear
  C)
                  270 ml   done clear
  D)
                  350 ml done clear
  View Solution play_arrow