Chemistry - 9 Chapter - 6
State of Matter
Test - 17

1. The process in which solids directly changes into vapours is called ____________.


2. Owing to the presence of cohesive forces a liquid has a ____________ volume


3. The temperature of a liquid at which its vapour pressure become equal to the atomospheric pressure is called____________.


4. The escape of the molecules from the surface of the liquid at all temperature is called______________.


5. The forces of attraction between the molecules of a compound are called ____________.


6. The inter molecular forces are of three types and are collectively called_____________.


7. Due to the presence of ______________, the molecules of water exist in the form of aggregates


8. The free movement of the molecules of gasses and liquids is called _____________.


9. The Scottish chemist, ______________ discovered that a lighter gas can diffuse through a porous pot faster than the heavier one


10. According to Kinetic Theory of matter, particles possess___________ energy


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