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Chemistry - 9 Chapter - 6
State of Matter
Test - 9
1.
The molecules of ice have:
a) An ionic bond present between them.
b) A coordinate covalent bond present between them.
c) Vander wall's forces present between them.
2.
How heating in liquid will affect its evaporation:
a) Initially decreases and then increases upon further heating
b) Decreases
c) Remains same
d) Increases
3.
0^C temperature of water is called:
a) Freezing point
b) Both melting and freezing point.
c) Melting point
d) Boiling point
4.
Cooling the vapors of some compounds change them directly into solid state. This phenomenon is called:
a) Sublimation
b) Condensation
c) Boiling
5.
The free movement of molecules in liquid makes them:
a) Conductors
b) Non-metals
c) Non-electrolytes and non-conductors
d) Electrolysis
6.
It is easy to compress air as compared to water. Why?
There are large empty spaces between molecules of air, when pressure is applied the size of these spaces is reduced and air is compressed. In water molecules are already very close and ----------- compressed further.
a) can be
b) cannot be
7.
How does a liquid evaporate?.............
Liquid molecules keep on moving freely. Some molecules when come to the surface of earth they overcome ionic force and escape into atmosphere. This happens at --------------------.
a) all temperatures
b) all temperatures
8.
What is the condition of the particles of a solid at its melting point?
The kinetic energy and movement of particles of solids increase with the increase in temperature. Near boiling point the energy and movement of particles is at its peak which overcomes the ---------- forces and solid melts.
a) binding
b) cohesive
9.
What is the condition of the particles of a solid at its melting point? ......................... The kinetic energy and movement of particles of solids increase with the increase in temperature. Near boiling point the energy and movement of particles is at its peak which overcomes the ----------- forces and solid melts.
a) binding
b) cohesive
10.
Boiling and evaporation occurs at a specific temperature for each liquid.
a) True
b) False
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