Free MCQs & Online Quiz Practice for Exams

Q: Rate of diffusion of NH₃ is 1·6 times faster than CO₂. The correct form of the rate law equation for this statement will be: (ETEA 2005)

A) rNH₃/rCO₂ = 1/·6

B) rNH₃/rCO₂ = 1·6

C) rcO₂/rNH₃ = 1/·6

D) None of these

Q: Which gas deviates most from ideal behavior at room temperature and pressure? (ETEA 2005)

A) Hydrogen

B) Nitrogen

C) Methane

D) Sulphur dioxide

Q: Consider the equation: N₂ + O₂ → 2NO. The partial pressure of NO under normal conditions is: (ETEA 2006)

A) 0.05 atm

B) 0.25 atm

C) 0.35 atm

D) 0.45 atm

Q: In a closed room of 100 m³, a perfume bottle is opened up. The room develops smell. This is due to which property of gases? (ETEA 2007)

A) Diffusion

B) Viscosity

C) Density

D) None of these

Q: A bottle of dry NH₃ and a bottle of dry HCl connected through long tube are opened simultaneously at both ends. The white NH₄Cl ring formed will be: (ETEA 2007)

A) At the center of tube

B) Near the NH₃ bottle

C) Near the HCl bottle

D) Throughout the length of the tube

Q: If a single balloon is filled with equal volumes of hydrogen, helium, nitrogen, and neon, which gas will be depleted first? (ETEA 2007)

A) Helium

B) Hydrogen

C) Nitrogen

D) Neon

Q: 4.0 dm³ of O₂ at a pressure 800 atm and 1.0 dm³ of N₂ at a pressure of 100 atm are put into a 2.0 dm³ vessel. The total pressure in the vessel is: (ETEA 2008)

A) 80 atm

B) 60 atm

C) 900 atm

D) 200 atm

Q: The ideal gas equation is PV = nRT. The symbol n in SI units represents: (ETEA 2008)

A) The number of molecules in the gas

B) Hydrogen

C) Nitrogen

D) Neon

Q: Real gases deviate more from ideal behavior at: (ETEA 2009)

A) At high temperature only

B) High pressure only

C) High pressure and low temperature

D) Low pressure and high temperature

Q: At constant temperature if the pressure of the gas is doubled its volume becomes: (ETEA 2010)

A) One half

B) Double

C) Four times

D) Remains the same

Q: Which scientist made the following proposal: equal volume of gases under the same conditions of temperature and pressure contains the same number of particles? (ETEA 2010)

A) Gay-Lussac

B) Curie

C) Dalton

D) None

Q: Which one of the following closely resembles an ideal gas? (ETEA 2011)

A) Xe

B) H₂

C) CO₂

D) He

Q: At constant temperature, if the volume of a given mass of gas is doubled, then the density of gas becomes: (ETEA 2011)

A) Double

B) One half

C) One quarter

D) Four times

Q: Why does an ideal gas exert pressure on its container? (ETEA 2012)

A) The molecules of the gas collide continually with each other

B) The molecules of the gas collide inelastically with the walls of the container

C) The molecules of the gas collide continually with the walls of the container

D) The weight of the molecules exerts a force on the walls of the container

Q: Which thermodynamic temperature is equivalent to 501.85 °C? (ETEA 2013)

A) 775.0 K

B) 774.85 K

C) 228.85 K

D) 228.70 K

Q: 40.0 dm³ of an ideal gas at 25 °C and 750 mmHg is expanded to 50.0 dm³. The pressure of the gas changed to 765 mmHg. What is the temperature of the gas? (ETEA 2013)

A) (291·2)(750)(50)/(40)(765)

B) (298)(765)(50)/(40)(750)

C) (291·2)(765)(50)/(750)(40)

D) (750)(40)/(298)(765)(50)

Q: The internal energy of fixed mass of an ideal gas depends on: (ETEA 2013)

A) Pressure, but not volume or temperature

B) Temperature, but not pressure or volume

C) Volume, but not pressure or temperature

D) Pressure and temperature but not volume

Q: The van der Waals equation of state for non-ideal gases differs from the ideal gas law in that it accounts for: (ETEA 2014)

A) The mass of each molecule of the gas

B) The volume of each molecule of the gas

C) The attractive forces between molecules of the gas

D) II and III only

Q: Which statement is wrong about the fourth state of matter known as plasma? (ETEA 2014)

A) The plasma contains equal amount of positive and negative charges and is almost neutral as a whole

B) Plasma exists in the atmosphere of stars

C) Plasma exists in the region around the sun

D) There is less amount of matter in plasma state than the familiar solid, liquid and gaseous states

Q: Equal volumes of different gases under same condition of temperature and pressure contain the same number of particles. The above statement is of: (ETEA 2014)

A) Avogadro's law

B) Graham's law

C) Dalton's law

D) Hund's rule