41
Thermal conduction takes places in
Answer: solids, liquids and gases.
Questions
43
When a sample of hot water is cooled slowly to room temperature, the temperature of the sample _______.
Answer: decreases
45
______ is a process in which solids go directly into gaseous state without going through the liquid state.
Answer: Sublimation
46
The phase or state of matter can change when the ______ of the substance changes.
Answer: temperature
47
During summer, water kept in an earthen pot becomes cool because of the phenomenon of
Answer: evaporation
48
Solids are usually ______ since their particles are closely packed together.
Answer: hard
49
Which one of the following sets of phenomena would increase on raising the temperature?
Answer: Evaporation, diffusion, expansion of gases
51
The space inside a container that is occupied by matter is its ______.
Answer: volume
52
______ is a physical quantity which expresses the amount of matter in a body.
Answer: Mass
53
Which one of the following is TRUE for compounds?
Answer: It has fixed melting and boiling point.
55
The particles of a suspension will be of size ________
Answer: greater than 100nm
56
Solution which has uniform composition throughout is called ___________.
Answer: homogeneous solution
57
When two liquids in a mixture differ by their boiling points, which of the following is the best method to separate these liquids?
Answer: Distillation
58
A mixture of water and silver chloride can be separated by
Answer: Filtration
59
Removal of clear layer of the liquid without disturbing the settled solid is known as __________.
Answer: Decantation
