As of the 1990s, scientists have proved the existence of how many states of matter?
  • Four
  • Five
  • Three
  • Two
The boiling point of water on Celsius and Kelvin scale respectively is:
  • 100, 373
  • 273, 373
  • 373, 273
  • 0, 273
Which of the following describes the liquid phase?
  • It has a definite shape but not a definite volume
  • It has a definite volume but not a definite shape
  • It has a definite shape and a definite volume
  • It has neither a definite shape nor a definite volume
Densities of two gases are in the ratio 1: 2 and their temperatures are in the ratio 2 : 1, then the ratio of their respective pressure is:
  • 1 : 2
  • 1 : 1
  • 4 : 1
  • 2 : 1
When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime whole water has turned pink. This is due to:
  • Sublimation of crystals
  • Diffusion
  • Boiling
  • Melting of potassium permanganate crystals
Equal volumes of all gases under similar conditions of temperature and pressure contain equal numbers of molecules. This statement was made by:
  • Gay- lussae
  • Berzilius
  • John Dalton
  • Avogadro
Non- reacting gases have a tendency to mix with each other. This phenomenon is known as:
  • Chemical reaction
  • Diffusion
  • Effusion
  • Explosion
What term is used to describe the phase change of a solid to a liquid?
  • Boiling
  • None of the above
  • Melting
  • Freezing
At higher altitudes:
  • No change in boiling point
  • Melting point of solid increases
  • Boiling point of a liquid decreases
  • Boiling point of a liquid increases
Boyle’s law states that the:
  • Pressure of a gas is inversely proportional the volume at constant temperature
  • Volume is directly proportional to the temperature at constant pressure
  • None of the above
  • Pressure of a gas is directly proportional to the temperature at constant volume
When a teaspoon of solid sugar is dissolved in a glass of liquid water, what phase or phases are present after mixing:
  • Solid only
  • None of these
  • Liquid only
  • Still solid and liquid
0 h : 0 m : 1 s

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