Matter and Its Composition CDS Questions

Matter and Its Composition MCQ Questions

13.
The three classical states of matter (solid, liquid, and gas) arise as a result of the relative balance between intermolecular forces of attraction and:
A.
The atmospheric pressure surrounding the substance, with no reference to temperature
B.
The electrical charge of the constituent molecules
C.
The exact colour of the substance under consideration
D.
The thermal (kinetic) energy of the constituent molecules
ANSWER :
D. The thermal (kinetic) energy of the constituent molecules
14.
Solids are characterised by which of the following key properties?
A.
A definite (fixed) shape and a definite (fixed) volume, due to closely packed particles with very limited freedom of movement
B.
No definite shape, but a definite, fixed volume
C.
Definite shape, but a volume that varies wildly and unpredictably depending on the container used
D.
Neither a definite shape nor a definite volume
ANSWER :
A. A definite (fixed) shape and a definite (fixed) volume, due to closely packed particles with very limited freedom of movement
15.
Liquids are characterised by which of the following key properties?
A.
A definite (fixed) shape and a definite (fixed) volume, identical to solids
B.
No definite (fixed) shape, but a definite (fixed) volume, taking the shape of whatever container they occupy
C.
Neither a definite shape nor a definite volume, identical to gases
D.
A definite shape, but a volume that changes significantly depending on the container's specific shape
ANSWER :
B. No definite (fixed) shape, but a definite (fixed) volume, taking the shape of whatever container they occupy
16.
Gases are characterised by which of the following key properties?
A.
Neither a definite (fixed) shape nor a definite (fixed) volume, readily expanding to completely fill whatever container they occupy
B.
Both a definite shape and a definite volume, identical to solids
C.
A definite (fixed) volume, but no definite shape
D.
A definite (fixed) shape, but no definite volume
ANSWER :
A. Neither a definite (fixed) shape nor a definite (fixed) volume, readily expanding to completely fill whatever container they occupy
17.
Among the three classical states of matter, the constituent particles are typically MOST closely packed together, and exhibit the LEAST freedom of movement, in which state?
A.
Liquid
B.
All three states have identical particle spacing and freedom of movement
C.
Gas
D.
Solid
ANSWER :
D. Solid
18.
The process by which a solid directly transforms into a gas, without passing through an intermediate liquid state, is called:
A.
Evaporation
B.
Condensation
C.
Sublimation
D.
Fusion (melting)
ANSWER :
C. Sublimation