JEE Questions for Chemistry States Of Matter Quiz 6 - MCQExams.com

Equal weights of ethane and hydrogen are mixed in an empty container at 25oC. The fraction of the total pressure exerted by hydrogen is
  • 1 : 2
  • 1 : 1
  • 1 : 16
  • 15 : 16
A sample of O2 gas is collected over water at 23ºC at a barometric pressure of 751 mm Hg (vapour pressure of water at 23ºC is 21 mm Hg). The partial pressure of O2 gas in the sample collected is
  • 21 mm Hg
  • 751 mm Hg
  • 0.96 atm
  • 1.02 atm
If some moles of O2 diffuse in 18 sec and same moles of other gas diffuse in 45 sec then what is the molecular weight of the unknown gas?

  • Chemistry-States of Matter-7717.png
  • 2)
    Chemistry-States of Matter-7718.png

  • Chemistry-States of Matter-7719.png

  • Chemistry-States of Matter-7720.png
The rate of diffusion of methane at a given temperature is twice that of gas X.The molecular weight of X is
  • 64.0
  • 32.0
  • 4.0
  • 8.0
50 ml of gas A diffuse through a membrane in the same time as 40 ml of a gas B under identical pressure-temperature conditions. If the molecular weight ofA is 64, that of B would be
  • 100
  • 250
  • 200
  • 80
0.5 mole of each of H2, SO2 and CH4 are kept in a container. A hole was madein the container. After 3 hours, the order of partial pressures in the container will be

  • Chemistry-States of Matter-7724.png
  • 2)
    Chemistry-States of Matter-7725.png

  • Chemistry-States of Matter-7726.png

  • Chemistry-States of Matter-7727.png
The rms velocity of an ideal gas at 27ºC is 0.3 ms-1. Its r.m.s velocity at 927ºC (in m-1) is
  • 3.0
  • 2.4
  • 0.9
  • 0.6
By how many folds the temp. of a gas would increase when the r.m.s velocity of gas molecules in a closed container of fixed volume is increased from 5 × 104cms-1 to 10 × 104cms-1
  • 0.5 times
  • 2 times
  • 4 times
  • 16 times
Ratio of Cp and Cvof gas ‘X’ is 1.4. The number of atoms of the gas ‘X’ present in 11.2 litres of it at N.T.P. is

  • Chemistry-States of Matter-7731.png
  • 2)
    Chemistry-States of Matter-7732.png

  • Chemistry-States of Matter-7733.png

  • Chemistry-States of Matter-7734.png
The vapour density of a gas is 11.2. The volume occupied by 11.2 g of this gasat N.T.P. is
  • 1 L
  • 11.2 L
  • 22.4 L
  • 20 L
At 100ºC and 1 atm, if the density of liquid water is 1.0 g cm-3 and that of water vapour is 0.0006 g cm-3, then the volume occupied by water moleculesin 1 litre of steam at that temperature is
  • 6 cm3
  • 60 cm3
  • 0.6 cm3
  • 0.06 cm3
If X is the total number of collisions which a gas molecule registers with others per unit time under particular conditions, then the collision frequency of the gas containing N molecules per unit volume is
  • X/N
  • NX
  • 2NX

  • Chemistry-States of Matter-7736.png
A gas is found to have a density of 1.80 g L-1 at 760 mm pressure and 27ºC.The gas will be
  • O2
  • CO2
  • NH3
  • SO2
4.0 g of argon (at mass =in a bulb at a temperature of TK had a pressure P atm. When the bulb was placed in hotter bath at a temperature 50o more than the first one, 0.8 g of gas had to be removed to get the original pressure.T is equal to
  • 510 K
  • 200 K
  • 100 K
  • 73 K
The density of helium is 0.1782 g per litre at N.T.P. Its density at 27oC and 740 mm Hg will be

  • Chemistry-States of Matter-7739.png
  • 2)
    Chemistry-States of Matter-7740.png

  • Chemistry-States of Matter-7741.png

  • Chemistry-States of Matter-7742.png
A gas container observes Maxwell distribution of speeds. If the number of molecules between the speed 5 and 5.1 km sec-1 at 25ºC be ‘n’, what would be the number of molecules between this range of speed if the total number of molecules in the vessel are doubled?
  • n2
  • n
  • n/2
  • 2n
Two glass bulbs A and B are connected by very small tube having a stop cock.Bulb A has a volume of 100 ml and contained the gas while bulb B was empty and had a volume of 150 ml. On opening the stop-cock, the pressure of the gas in bulb A will fall down to
  • 80%
  • 60%
  • 40%
  • 20%.
Air contains 79% N2 and 21% O2by volume. If the barometric pressure is 750mm Hg, the partial pressure of oxygen is
  • 157.5 mm of Hg
  • 175.5 mm of Hg
  • 3125.0 mm of Hg
  • None of these
If the density of air at 298 K and 101.325 kPa is 1.161 kg m-3, then assuming air to behave like an ideal gas, the average molar mass of air (g mol-1) is

  • Chemistry-States of Matter-7746.png
  • 2)
    Chemistry-States of Matter-7747.png

  • Chemistry-States of Matter-7748.png

  • Chemistry-States of Matter-7749.png
An evacuated bulb of 0.1 m3 size is filled with UF6 at 300 K and 2.46 ×10-2 atm pressure. The mass of UF6 in the bulb is (mol mass of UF6 is 350 and R is 0.082 litre atm deg-1 mol-1)
  • 17.5 g
  • 35 g
  • 17.5 g
  • 34 g

Chemistry-States of Matter-7752.png
  • 8
  • 12
  • 16
  • 20
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