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CHAPTER 7

PROPERTIES OF MATTER

Encircle the most appropriate answer from the following options


1.         The quality of the matter due to which it restores its size and shape when force ceases to act on it:

(a) Inertia        

(b) Elasticity

(c) Permittivity

(d) Rigidity


2.         The force that acts on unit area of an body and thus changes its shape or size:

(a) Stress      

(b) Strain

(c) Yong’s Modulus    

(d) Elastic limit


3.         In system international, the unit of stress is:

(a) Nm2

(b) Nm1

(c) Nm

(d) None of above


4.         The ratio of change in length to the original length will be :

(a) Stress       

(b) Tensile strain

(c) Young’s Modulus  

(d) Elastic limit


5.         When stress is increased, the strain also goes on:    

(a) Decreasing           

(b) Increasing

(c) Constant   

(d) All of above


6.         The law about stress and strain is presented by:

(a) Hook        

(b) Newton

(c) Joule         

(d) Archimedes


7.         According to Hook’s law, the elastic limit stress and strain has  proportion of:

(a) Inverse      

(b) Direct

(c) Same        

(d) None of above


8.         The ratio of tensile stress and tensile strain is:

(a) Variable    

(b) Pascal’s Law

(c) non-uniform          

(d) None of above


9.         The unit of Young’s modulus is:

(a) Nm2

(b) Nm1

(c) Nm

(d) None of above


10.       The force exerted perpendicularly on unit area of a body is known as :

(a) Strain        

(b) Constant

(c) Pressure  

(d) Work


11.       The unit of pressure is:

(a) Nm2

(b) Nm1

(c) Pa 

(d) Both a & c


12.       Pressure depends upon:

(a) Density     

(b) Depth

(c) Temperature         

(d) Both a & b


13.       If a body is at a depth of ‘h’ from the liquid surface of density ‘p’, then the pressure ‘P’ on that body is:

(a) P = w/t      

(b) P = pgv

(c) P = pgh    

(d) p = F/a


14.       The law about pressure on the object is presented by:

(a) Joule         

(b) Pascal

(c) Newton     

(d) Galileo


15.       Hydraulic press is based on:  

(a) Joule’s law

(b) Pascal law

(c) Newton’s law        

(d) Young’s Modulus


16.       If the pressure is exerted on a liquid, liquid transmits it:

(a) Variably    

(b) Equally

(c) In all directions      

(d) both b & c


17.       Hydraulic brake works on the principle of:    

(a) Hydraulic press    

(b) Pascal law

(c) Joule’s law

(d) Both a & b


18.         tells about the floating and sinking of objects:

(a) Pascal’s law          

(b) Newton’s law

(c) Archimedes principle    

(d) None of them


19.       Because of pressure difference on an object, an upward force acts on the object called :

(a) Weight      

(b) Buoyant force

(c) Stress       

(d) All of above


20.       Buoyant force is equal to the ———- of the liquid displaced by the object:

(a) Volume     

(b) Density

(c) Weight     

(d) All of above


21.       The body will float on the liquid surface when:

(a) W > F

(b) W < F

(c) W = F

(d) None of above


22. The body will sink in the liquid surface when:

(a) W > F

(b) W < F

(c) W = F

(d) None of above


23.       Submarine works on the principle of:

(a) Pascal’s law          

(b) Newton’s law

(c) Archimedes principle    

(d) None of them


24.       When temperature of the gas increases, gas pressure ————–:

(a) Increases 

(b) Decreases

(c) Remains same     

(d) None of above


25.       If quantity of the gas is increased in the container then gas pressure ——-:

(a) Increases 

(b) Decreases

(c) Remains same     

(d) None of above


26.       According to Kinetic Molecular theory, gases exert pressure on the walls of the container due to their:

(a) Weight      

(b) Mass

(c) Collisions  

(d) All of above


27.       The molecules of the matter are always remain in the state of:

(a) Rest          

(b) Plasma

(c) Motion     

(d) Tension


28.       The energy possessed by the molecules of the matter is due to its motion:

(a) P.E.           

(b) K.E.

(c) Sound       

(d) None of above


29.       When temperature of the matter increases, intermolecular forces ——:

(a) Increases  

(b) Decreases

(c) Remains same     

(d) None of above


30.       Molecules of which state of matter have strongest attractive for

(a) Solid         

(b) Liquid

(c) Gasses     

(d) Plasma


31.       How many states of mother are?

(a) 2

(b) 3

(c) 4

(d) many


32.       Weakest attractive forces are in

(a) solid          

(b) liquid

(c) gases       

(d) Plasma


33.       Weakest attractive forces are in

(a) solid          

(b) liquid

(c) gases       

(d) plasma


34.       Ionic state of matter is called 

(a) gas

(b) plasma

(c) liquid         

(d) none of these


35.       Plasma is

(a) Good conductor   

(b) Bad conductor

(c) Semiconductor   

(d) non conductor


36.       Unit of density

(a) kg m3           

(b) kg m-2

(c) kg m-3       

(d) kg m2


37.       Unit of pressure is      

(a) Nm2

(b) Pa

(c) Nm

(d) Both a & b


38.       The instrument used to measure atmospheric pressure

(a) Colorimeter           

(b) Hypsometer

(c) Barometer           

(d) None of these


39.       A solid object is:

(a) Not elastic below the elastic limit 

(b) Elastic above the elastic limit

(c) Elastic below the elastic limit   

(d) None of above