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If pressure at any point in the liquid approaches the vapor pressure, liquid starts vaporising and creates pockets or bubbles of dissolved gases and vapours. This phenomenon is ________.
  • a)
    Surface tension
  • b)
    Adhesion
  • c)
    Vaporisation
  • d)
    Cavitation
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
If pressure at any point in the liquid approaches the vapor pressure, ...
At the boiling point, the saturated vapor pressure is equal to atmospheric pressure. Due to this pressure equalisation bubbles formation take place so the vaporization becomes a volume phenomenon.
Cavitation:
Cavitation is the phenomenon of the formation of vapour bubbles of a flowing liquid in a region where the pressure of the liquid falls below the vapour pressure and sudden collapsing of these vapour bubbles in a region of higher pressure. When the vapour bubbles collapse, a very high pressure is created. The metallic surfaces, above which the liquid is flowing, is subjected to these high pressure which cause pitting action on the surface. Thus cavities are formed on the metallic surface and hence the name is cavitation.
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If pressure at any point in the liquid approaches the vapor pressure, liquid starts vaporising and creates pockets or bubbles of dissolved gases and vapours. This phenomenon is ________.a)Surface tensionb)Adhesionc)Vaporisationd)CavitationCorrect answer is option 'C'. Can you explain this answer?
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