The attraction that causes water and other liquids to form drops is called ________________. This is also water’s ability to be attracted to other water molecules.
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  • adhesion
  • capillary action
  • cohesion
  • surface tension
Water is a ____________________________ .
  • mixture
  • atom
  • compound
  • solid
Water molecule is made of ___________ of hydrogen and __________________ atom of oxygen.
  • one , two
  • three , two
  • two , one
  • two , two
Sublimation is a process of changes in the state of matter from ___________________________________________
  • gas to solid
  • solid to liquid
  • liquid to gas
  • gas to liquid
These two processes absorbs heat energy during the changes in the state of matter.
  • freezing and evaporation
  • evaporation and condensation
  • boiling and melting
  • freezing and condensation
During electrolysis the ___________________ gas is produced at the anode
  • oxygen
  • hydrogen
The impurities such salt when added to water will _______________ the freezing point of water.
  • increase
  • remain the same
  • decrease
Evaporation only occurs on the ___________________ of water
  • bottom
  • surface
  • boiling point
When we add salt into pure water, the boiling point of the solution will
  • be more than the pure water boiling point.
  • be less than the pure water boiling point.
  • same as the pure water boiling point.
Insects like daddy longlegs can move on the surface of the water because of
  • water has higher density than insects.
  • water is heavier than the insects.
  • water has high surface tension.
What is the name of the phenomenon than make the water moves from the bottom to the leaves?
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  • Conduction action
  • Capillary action
  • Transpiration
  • Translation
During electrolysis, the gas produced at anode is
  • hydrogen
  • nitrogen
  • chlorine
  • oxygen
When a lighted wooden splint is put a the mouth of the test tube containing this gas, a 'pop' sound is heard. What is the gas name?
  • hydrogen
  • nitrogen
  • chlorine
  • oxygen
The melting point of pure water is .................  °\degree° C
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  • -2
  • 0
  • 2
  • 100
The boiling point of pure water is ..............  °\degree° C
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  • 100
  • 102
  • 0
  • -2
The process of ice cube changes into water is know as ...................
  • melting
  • condensation
  • boiling
  • sublimation
This process involved the release of high amount of heat energy from water and makes the water molecules to become closer to each other in fixed position.
  • Melting
  • Freezing
  • Boiling
  • Condensation
The process involved in the changes of ice cube into water vapour or vice verse.
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  • Condensation
  • Sublimation
  • Freezing
  • Melting
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