This page requires a JavaScript-enabled browser
Instructions on how to enable your browser are contained in the help file.
Chemistry - 9 Chapter - 6
State of Matter
Test - 5
1.
What is evaporation?
a) The continuous escape of the molecules of a liquid from its surface without raising its temperature.
b) The continuous escape of the molecules of a solid from its surface without raising its temperature.
2.
Why liquids do not have any specific shape?..................... Particles of solids are so strongly held that they can only vibrate with out changing position. In liquids the cohesive forces are not so strong and particles can move and change position due to which liquids do not have ------ shape
a) flexible
b) solid
3.
Minimum cohesive forces exist between the particles of _____.
a) Gas
b) Solid
c) Liquid
4.
Molecules of gases move very fast in all possible directions.
a) False
b) True
5.
Why gas neither has a fixed mass nor volume?
a) Due to least cohesive force among molecules and due to this their free movement in all possible directions.
b) Due to strong cohesive force among molecules and due to this their free movement in all possible directions.
6.
Why gases exert pressure on walls of the container?
a) Due to continuous collision of molecules with the wall of container.
b) Due to continuous collision of electrons with the wall of container.
7.
What is meant by elastic collision? .................... When gas molecules collide with each other their total energy does not increase or increase. This type of collision is called -------- collision.
a) a solid
b) an elastic
8.
Kinetic energy of _____ molecules is the highest.
a) Gas
b) Solid
c) Liquid
9.
Distance between the molecules of a _____ is the largest.
a) Solid
b) Gas
c) Liquid
10.
Distance between the molecules of a solid is the largest.
a) True
b) False
This is more feedback!
This is the feedback!
