The evaporation of a liquid can best be carried out in a:
  • Beaker
  • Flask
  • Test tube
  • China dish
Which of the following processes is known as fusion?
  • Change of gaseous state to solid state
  • Change of solid to liquid
  • Change of liquid to vapor
  • Change of liquid to solid
Density of a substance is defined as
  • ratio of mass and volume
  • product of mass and volume
  • product of mass and temperature
  • ratio of mass and temperature
Rate of diffusion depends upon:
  • Surface area
  • None of these
  • Temperature
  • Both temperature and surface area
Which is more effective in cooling?
  • Water at 273 K
  • Ice at 373K
  • Water at 373K
  • Ice at 273K
Which one will help to accelerate the process of evaporation of a liquid kept in an open china dish?
  • Keeping dish in open
  • Blowing air into the liquid
  • Keeping the dish under a running fan
  • All the above
When a gas is compressed keeping temperature constant. It results in:
  • Decrease in speed of gaseous molecules
  • Decrease in collision among gaseous molecules
  • Increase in sped of gaseous molecules
  • Increase in collision among gaseous molecules
100 K is equal to:
  • -2730C
  • -1730C
  • 1830C
  • 1730C
Gases can be liquefied by
  • increasing pressure
  • decreasing temperature
  • increasing pressure and decreasing temperature
  • decreasing pressure
For an ideal gas number of moles per liter in terms of its pressure P, gas constant R and temperature T is:
  • P/RT
  • PT/R
  • PRT
  • RT/P
The one, in which interparticle forces are strongest, is:
  • Sodium chloride
  • Ether
  • Hydrogen
  • Carbon dioxide
What is Dry Ice?
  • Solid carbon dioxide
  • None of these
  • Ice having no water of crystallization
  • Ice that has been dried
The melting point temperature of the solid state of a substance is 400C. The freezing point temperature of the liquid state of the same substance will be:
  • 400C
  • 350C
  • 450C
  • Can’t predict
Which of the following expression at constant pressure represents Charle’s law?
  • V/T =constant
  • None of the above
  • VT=constant
  • PV=constant
According to Graham’ law at a given temperature, the ratio of the rates of diffusion rA /rB of gases A and B is given by:
  • (PB / MB) (PA / MA)1/2
  • (MA / MB)) ( PB / PA)1/2
  • (PA / PB) (MA / MB )1/2
  • (MA / MB) (PA / PB)1/2
Rate of diffusion of a gas is:
  • Inversely proportional to the square root of its density
  • Directly proportional to its density
  • Directly proportional to its molecular mass
  • Inversely proportional to the square root of its molecular mass
Select the one that when used would be considered as best condition for liquification of a gas:
  • Decreasing the pressure and increasing the temperature.
  • Increasing the pressure and decreasing the temperature
  • Increasing the temperature
  • Decreasing the pressure
00 C temperature is equal to
  • 300 K
  • -273 K
  • 0 K
  • 273 K
Pressure of air at sea level is:
  • 760 cm of Hg
  • All are correct
  • 76 mm of Hg
  • One atmosphere
Which one is a sublime substance?
  • Iodine
  • Table salt
  • Sugar
  • Potassium iodide
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