Which of the following phenomena would increase on raising the temperature?
  • Diffusion, evaporation, compression of gases
  • Evaporation, compression of gases, solubility
  • Evaporation, diffusion, expansion of gases
  • Evaporation, solubility, diffusion, compression of gases
Seema visited a Natural Gas Compressing unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions.
  • Low temperature, low pressure
  • High temperature, low pressure
  • Low temperature, high pressure
  • High temperature, high pressure
The property of flow is unique to fluids. Which one of the following statements is correct?
  • Only gases behave like fluids
  • Gases and solids behave like fluids
  • Gases and liquids behave like fluids
  • Only liquids are fluids
During summer, water kept in an earthen pot becomes cool because of the phenomenon of
  • diffusion
  • transpiration
  • osmosis
  • evaporation
A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?
  • Water, air, wind
  • Air, sugar, oil
  • Oxygen, water, sugar
  • Salt, juice, air
On converting 25°C, 38°C and 66°C to Kevlin scale, the correct sequence of temperature will be
  • 298 K, 311 K and 339 K
  • 298 K, 300 K and 338 K
  • 273 K, 278 K and 543 K
  • 298 K, 310 K and 338 K
Choose the correct statement from the following:
  • Conversion of solid into vapour without passing through the liquid state is called vapourisation.
  • Conversion of vapour into solid without passing through the liquid state is called sublimation.
  • Conversion of vapour into solid without passing through the liquid state is called freezing.
  • Conversion of solid into liquid is called sublimation.
The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?
  • 306 K, 329 K and 391 K
  • 308 K, 329 K and 392 K
  • 308 K, 329 K and 391 K
  • 329 K, 392 K and 308 K
Which condition out of the following will increase the evaporation of water?
  • Increase in temperature of water
  • Decrease in temperature of water
  • Less exposed surface area of water
  • Adding common salt to water
The boiling point of water at sea level is
  • 0°C
  • 273 K
  • 373 K
  • 273°C
Which of the following has the strongest interparticle forces at room temperature?
  • Oxygen
  • Water
  • Bromine
  • Iron
Which of the following conditions is most favourable for converting a gas into a liquid?
  • High pressure, low temperature
  • Low pressure, low temperature
  • Low pressure, high temperature
  • High pressure, high temperature
Dry ice is
  • water in solid state
  • water in gaseous state
  • CO
  • None of the above
Zig-zag movement of the solute particle in a solution is known as
  • Circular motion
  • Linear motion
  • Brownian motion
  • Curved motion.
S.I. unit of temperature is:
  • Fahrenheit
  • Kelvin
  • None of these
  • Celsius
Select the one that is not a matter:
  • Feeling of hot
  • Smoke
  • Humidity
  • Water
Select the correct order of evaporation for water, alcohol, petrol and kerosene oil :
  • Alcohol > petrol > water > kerosene oil
  • Water > alcohol > kerosene oil > petrol
  • Petrol > alcohol > water > kerosene oil
  • Petrol > alcohol > kerosene oil > water
A bottle of ammonia and a bottle of dry hydrogen chloride connected through a long tube are opened simultaneously at both ends, the while ammonium chloride ring first formed will be:
  • At the center of the tube
  • Near the hydrogen chloride bottle
  • Near the ammonia bottle
  • Throughout the length of the tube
The process of change of liquid state into gaseous state at constant temperature is known as:
  • Melting
  • Evaporation
  • Boiling
  • Fusion
Which one is a surface phenomenon?
  • Evaporation
  • both evaporation and boiling
  • Boiling
  • None of these
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