JEE Questions for Chemistry States Of Matter Quiz 5 - MCQExams.com

Which is not true in case of an ideal gas?
  • It cannot be converted into a liquid
  • There is no interaction between the molecules
  • All molecules of the gas move with same speed
  • At a given temperature, PV is proportional to the amount of the gas
Vander Waal’s equation of state is obeyed by real gases. For n moles of a real gas, the expression will be

  • Chemistry-States of Matter-7659.png
  • 2)
    Chemistry-States of Matter-7660.png

  • Chemistry-States of Matter-7661.png

  • Chemistry-States of Matter-7662.png
The correct value of the gas constant ‘R’ is close to:
  • 0.082 litre-atmosphere K
  • 0.082 litre-atmosphere K-1 mol-1
  • 0.082 litre-atmosphere-1 K mole-1
  • 0.082 litre-1 atmosphere-1 K mol
If C1, C2, C3…….represent the speeds of n1, n2, n3….molecules, then the root mean square speed is

  • Chemistry-States of Matter-7664.png
  • 2)
    Chemistry-States of Matter-7665.png

  • Chemistry-States of Matter-7666.png

  • Chemistry-States of Matter-7667.png
At constant volume and temperature conditions, the rate of diffusion DA and DB of gases A and B having densities ρA and ρB are related by the expression,

  • Chemistry-States of Matter-7669.png
  • 2)
    Chemistry-States of Matter-7670.png

  • Chemistry-States of Matter-7671.png

  • Chemistry-States of Matter-7672.png
Under what conditions will a pure sample of an ideal gas not only exhibit a pressure of 1 atm but also a concentration of 1 mole litre-1?
(R = 0.082 litre atm mol-1deg-1)
  • At STP
  • When V = 22.4 litres
  • When T = 12K
  • Impossible under any conditions
The ratio among most probable velocity, mean velocity and root mean square velocity is given by
  • 1 : 2 : 3
  • 2)
    Chemistry-States of Matter-7675.png

  • Chemistry-States of Matter-7676.png

  • Chemistry-States of Matter-7677.png
The root mean square speeds at STP for the gases H2, N2 , O2 and HBr are in the order
  • H2 < N2 < O 2< HBr
  • HBr < O2 < N2 < H2
  • H2 < N2 = O2 < HBr
  • HBr < O2 < H2 < N2
What is the relationship between the average velocity (v), root mean square velocity (u) and most probable velocity (a)?
  • a : v : u :: 1.128 : 1.224
  • a : v : u :: 1.128 : 1 : 1.224
  • a : v : u :: 1.128 : 1.224 : 1
  • a : v : u :: 1.124 : 1.228 : 1
The temperature of the gas is raised from 27ºC to 927ºC, the root mean square velocity is

  • Chemistry-States of Matter-7681.png
  • same as before
  • halved
  • doubled
If three unreactive gases having partial pressures PA , PB, PC and their moles are 1, 2, and 3 respectively then their total pressure will be:
  • P = PA + PB + PC
  • 2)
    Chemistry-States of Matter-7683.png

  • Chemistry-States of Matter-7684.png
  • none
According to Grahman’s law at a given temperature, the ratio of the rates of diffusion rA/rB of gases A and B is given by
(Where P and M are the pressures and molecular weights of gases A and B respectively)

  • Chemistry-States of Matter-7685.png
  • 2)
    Chemistry-States of Matter-7686.png

  • Chemistry-States of Matter-7687.png

  • Chemistry-States of Matter-7688.png

Chemistry-States of Matter-7690.png

  • Chemistry-States of Matter-7691.png
  • 2)
    Chemistry-States of Matter-7692.png

  • Chemistry-States of Matter-7693.png
  • cannot be predicted unless the volumes of the gases are given.
The compressibility of a gas is less than unity at STP. Therefore
  • Vm > 22.4 litres
  • Vm < 22.4 litres
  • Vm = 22.4 litres
  • Vm = 44.8 litres
The r.m.s velocity of hydrogen is √7 times the r.m.s. velocity of nitrogen. If T is the temperature of the gas,
  • T(H= T(N2)
  • T(H> T(N2)
  • T(H< T(N2)
  • T(H= √7T(N2)
The following graph illustrates
Chemistry-States of Matter-7697.png
  • Dalton’s law
  • Charles’ law
  • Boyle’s law
  • Gay-Lussac’s law

Chemistry-States of Matter-7698.png
  • W
  • X
  • Y
  • Z
Which of the following volume (V)- temperature (T) plots represents the behaviour of one mole of an ideal gas at one atmospheric pressure?

  • Chemistry-States of Matter-7700.png
  • 2)
    Chemistry-States of Matter-7701.png

  • Chemistry-States of Matter-7702.png

  • Chemistry-States of Matter-7703.png
For an ideal gas, number of moles per litre in terms of its pressure P, gas constant R and temperature T is
  • PT/R
  • PRT
  • P/RT
  • RT/P
Positive deviation from ideal behavior takes place because of
  • molecular interaction between atoms and PV/nRT > 1
  • molecular interaction between atoms and PV/nRT < 1
  • finite size of the atoms and PV/nRT > 1
  • finite size of the atoms and PV/nRT < 1
If pressure becomes double at the same absolute temperature on 2 L CO2, then the volume of CO2 becomes
  • 2L
  • 4L
  • 5L
  • 1L
The volume of a gas is 100 mL at 100ºC. If pressure remains constant then at what temperature it will be 200 mL?
  • 200ºC
  • 473ºC
  • 746ºC
  • 50ºC
The volume of 1 g each of methane (CH4), ethane (C2H6), propane (C3H8) and butane (C4H10) was measured at 350 K and 1 atm. What is the volume of butane?
  • 495 cm3
  • 600 cm3
  • 900 cm3
  • 1700 cm3
If the pressure and absolute temperature of 2 litres of CO2 are doubled, the volume of CO2 would become
  • 2 litres
  • 4 litres
  • 5 litres
  • 7 litres
A weather balloon filled with hydrogen at 1 atm and 27ºC has volume equal to12000 litres. On ascending it reaches a place where temperature is – 23ºCand pressure is 0.5 atm. The volume of the balloon is
  • 24000 litres
  • 20000 litres
  • 10000 litres
  • 12000 litres
3.2 g of oxygen (At. wt. =and 0.2 g of hydrogen (At. wt. =are placed ina 1. 12 litre flask at 0oC. The total pressure of the gas mixture will be
  • 1 atm
  • 4 atm
  • 3 atm
  • 2 atm
Pressure of a mixture of 4g of O2 and 2 g of H2 confined in a bulb of 1 litre at 0ºC is
  • 25.215 atm
  • 31.205 atm
  • 45.215 atm
  • 15.210 atm
The density of methane at 2.0 atmosphere pressure and 27ºC is:
  • 0.13 g L-1
  • 0.26 g L-1
  • 1.30 g L-1
  • 26.0 g L-1
The volume of 2.8 g of carbon monoxide at 27ºC and 0.821 atm pressure is (R = 0.0821 lit atm K-1 mol-1)
  • 0.3 litre
  • 1.5 litre
  • 3 litre
  • 30 litre
Equal volumes of two gases which do not react together are enclosed in separate vessels. Their pressures at 100 mm and 400 mm respectively. If the two vessels are joined together, then what will be the pressure of the resulting mixture (temperature remaining constant)?
  • 125 mm
  • 500 mm
  • 1000 mm
  • 250 mm
0:0:1


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