StudentAidUnit 14: States of Matter and Phase Changes — Mcqs
10th Class Chemistry · Unit 14: States of Matter and Phase Changes
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Choose and tick the correct answer from the given choices.
1.According to kinetic theory, the basic difference between solid, liquid and gas is due to:
2.Upon heating the rate of evaporation:
3.The inter-particle attractions are the strongest in:
4.Cooling the vapours of some gases change them directly into solid state. This phenomenon is called:
5.Physical state in which the particles possess the maximum energy:
- a Solid
- b Liquid
- c Gaseous
- d Vapour
6.How does the process of evaporation depend on the force of attraction present among the molecules of a liquid?
7.Which gas will diffuse at the fastest rate?
8.The phase changes A and B in gas --A--> liquid --B--> solid are:
9.A student noticed frost falling on the ground at 6.30 am and disappearing by 8.30 am. Which phase change was responsible for changing the frost into water vapours?
SLO Based Multiple Choice Questions
10.On how many states do matter exist in the world:
- a One
- b Two
- c Three
- d Four
11.What are physical states of matter in which it exists in the world?
12.The properties of which state were firstly studied:
13.Encircle the physical property of a gas.
14.Water in all its three physical states remains ___ the same compound.
15.Which theory was formulated on the basis of random movement of molecules of gases?
16.Which behaviour is similar for a compound showing different physical states?
17.Which property of the gas molecules is responsible for the pressure exerted by a gas?
18.At low pressure, the nature of attractive forces between the particles of a gas:
19.What is the relation between average kinetic energy and temperature of a gas?
20.Which scale is used to measure the temperature of the gas directly related to kinetic energy?
21.Which physical property is characteristics of all gases?
22.Which type of movement is exhibited by liquid and gas molecules?
- a Translational
- b Rotational
- c Vibrational
- d All of these
23.Which type of movement is exhibited by solid molecules only?
24.Solids have fixed volume and fixed shape due to:
Internal Energy
25.Internal energy of a substance is due to its:
26.When heat is added, the internal energy of a system:
Interconversion of Physical States
27.Physical state of a solid substance can be changed by:
28.The temperature at which a solid starts melting is called:
29.How does temperature change after melting point has reached?
30.At melting point what changes occur in parts of a solid:
- a Loss of mean position
- b Loss of arrangement
- c Collapse of molecules
- d All of these
31.The heat provided after phase change is utilized in:
32.The escape of surface molecules of a liquid at all temperatures is called:
33.Evaporation is a surface phenomenon which occurs at:
34.The temperature at which vapour pressure of a liquid becomes equal to external pressure called its:
35.Temperature remains constant after heating a substance during:
36.When a gas is cooled it is converted to liquid, this process is called:
37.A graph which shows relation between internal energy and the temperature:
- a Heating curves
- b Cooling curves
- c Heating and cooling curves
- d None
38.Flat lines in heating and cooling curves show:
- a Melting point
- b Freezing point
- c Liquefaction point
- d Transition state
39.Phase change materials are utilized in fields of:
40.Heating and cooling curves can be studied equally but differ in:
41.Boiling of a liquid is indicated when:
42.Interconversion of physical state is affected by changing:
43.Ice melts in the hands of a snowball maker due to increase in:
44.From where the energy comes for evaporation:
- a Heat
- b Pressure
- c Inside the liquid
- d Sun
45.Which process produces cooling?
46.In Murree the boiling point of water is:
47.The compounds which show sublimation:
48.Which physical state is skipped in deposition?
49.Solid air fresheners, when exposed to atmosphere disappears due to:
Kinetic Theory and The Gas Laws
50.Pressure — volume relationship at constant temperature was first observed by a scientist named:
51.By doubling the pressure, Boyle's found the volume of a given mass of gas is:
52.A French scientists Jacques Alexander Charles observed a law which deals between two variables.
53.Which one is a mathematical form of Avogadro's law:
54.The temperature scale selected to explain Charles' law:
Diffusion
55.Which gas will diffuse faster under similar conditions of temperature and pressure?
- a N2
- b SO3
- c H2S
- d HCl
56.When Ammonia and Hydrogen Chloride react together Ammonium Chloride is formed having color of fumes:
57.The spontaneous intermingling of gas molecules to form a homogenous mixture:
Importance of rates of diffusion of medicine in human body
58.Once drug molecules are absorbed by blood, they start _______ into various tissues and organs:
59.Which kind of drugs can easily diffuse through cell membrane: