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WAEC questions for "Physics :: Matter"
Q1

In which of the following states of matter do the molecules vibrate about their mean positions? 

A

Liquids only

B

Solids only

C

Liquids and gases only

D

Solids, liquids and gases

E

Answer: B

Matter
Q2

Which of the following properties of steel bar can be measured in terms of the dimension of length only?

A

Weigt

B

density

C

Pressure

D

Volume

E

Answer: D

Matter
Q3

If the air inside a rigid box is heated, the 

I. average speed of molecules increases.

II. pressure of the air increases.

III. average separation of the molecules increases.

 Which of the statements above are correct? 

A

I and II only

B

II and III only 

C

I and III only

D

I, II and III

E

Answer: A

Matter
Q4

Which of the following sets of quantities is fundamental? 

A

Length, mass and time 

B

Speed , length and time 

C

Speed, mass and distance 

D

Distance, speed and time 

E

Answer: A

Matter
Q5

Which of the following statements about Archimedes principle is correct? The upthrust on a body is a measure of the 

A

mass of fluid displaced 

B

weight of the fluid displaced 

C

volume of the body 

D

weight of the fluid displaced

E

Answer: D

Matter
Q6

Which of the following observations is not an effect of surface tension?

A

Droplets of water dripping slowly from a tap

B

Mercury slipped on a clean glass plate forms small spherical droplets 

C

An insect walking across the surface of a pond

D

Water flowing out more easily than engine oil from a container 

E

Answer: B

Matter
Q7

Which of the following physical quantities is correctly paired with its corresponding S.I unit ?

A

Density [kg m3 ]

B

Power [J s-1]

C

Specific latent heat [J kg-1 K-1]

D

Pressure [ N m-1]

E

Answer: B

Matter
Q8

A liquid of volume 2.00m3 and density 1.00 x 103kg m-3 is mixed with 3.00 m3 of another liquid of density 8.00 x103kg m-3 . Calculate the density  of the mixture .

[ Assume there is no chemical reaction ]

A

5.20 x 102kg m-3

B

8.80 x 102kg m-3

C

1.13 x 103kg m-3

D

5.20 x 103kg m-3

E

Answer: D

Matter
Q9

Which of the folowing phenomena causes capillarity of liquids in tubes of narrow bore?

A

Viscosity

B

Surface tension

C

Osmosis

D

Brownian motion

E

Answer: B

Matter
Q10

Which of the following physical quantities are derived?

I. Area

II. Thrust

III. Pressure

IV. Mass

A

I, II,III and IV

B

I,II, and III only

C

I ,II and IV only

D

I and III only

E

Answer: B

Matter
Q11

A solid body will float in a liquid if its

A

density is less than that of the liquid

B

mass is equal to that of the liquid

C

density is greater than that of the liquid

D

mass is less than that of the liquid

E

Answer: B

Matter
Q12

Which of the following quantities is a vector?

A

Speed

B

Distance

C

Energy

D

Momentum

E

Answer: D

Matter
Q13

Which of the following phenomena is the practical evidence for the existence of the continual motion of molecules?

A

Translational motion

B

Rotational motion

C

Brownian motion

D

Oscilatory motion

E

Answer: C

Matter
Q14

Each of the following physical qualities is classified as a vector or a scalar quantity. Which of the classifications is correct?

A

Electric potential  (Vector)

B

Momentum (scalar)

C

Gravitational field intensity (scalar)

D

Magnetic flux density ( Vector)

E

Answer: D

Matter
Q15

The molecular structure of a liquid is such that

A

the molecules have unlimited freedom of movement

B

molecular movement is restricted to vibration

C

intermolecular collisions take place

D

all molecules move with the same speed

E

Answer: C

Matter
Q16

Which of the following concepts is not an evidence of the particle nature of matter? 

A

Diffusion

B

Brownian motion

C

Diffraction

D

Crystalization

E

Answer: D

Matter
Q17

Which of the following statements about the mass and the weight of a body  is not correct? Its

A

mass is a scalar quantity

B

weight is a function of the gravitational pull on it

C

mass on earth and on the moon is the same

D

weight at the equator and at the poles is the same

E

Answer: C

Matter
Q18

A steel needle floating on water, sinks when kerosine is added to the water. This is because the kerosine

A

increases the surface tension of the water

B

reduces the density of the water

C

reduces the surface tension of the water

D

reduces the upthrust on the needle

E

Answer: C

Matter
Q19

On which of the following factors does the viscosity of a liquid depend? 

I. Nature of the liquid.

II. Temperature of the liquid.

III. Area of the liquid surface

A

I and II only

B

II and III only

C

I and III only

D

I , II and III

E

Answer: D

Matter
Q20

A tuber of cassava can be processed into powder. This explains the fact that

A

matter can change spotaneously from one state to the another

B

matter cannot be destroyed

C

force is required to change matter from one state to another

D

matter is made up of tiny particles

E

Answer: D

Matter
Q21

A piece of metal of relative density 5.0 weighs 60N in air. Calculate its weight when fully immersed in water

A

4N

B

5N

C

48N

D

60N

E

Answer: C

Matter
Q22

One common characteristic of solids, liquids and gases is that

A

all the three have fixed volume

B

their molecules have the same size

C

their molecules are always in motion

D

all the three have the same inter molecular forces

E

Answer: B

Matter
Q23

The force between the molecules of a liquid in contact with that of a solid is

A

adhesive

B

cohesive

C

magnetic

D

repulsive

E

Answer: A

Matter
Q24

The energy needed to separate the nucleons against the forces which hold them together is

A

nuclear energy

B

mechanical energy

C

ionsation energy

D

binding energy

E

Answer: D

Matter
Q25

Which of the following physical processes cannot be explained by the molecular theory of matter?

A

Evaporation

B

Thermal conduction

C

Radiation of heat

D

Convectional currents in fluids

E

Answer: C

Matter
Q26

When a surface of a piece of chalk is scrapped, the tiny particles that flake off are known as

A

matter

B

molecules

C

elements

D

atoms

E

Answer: D

Matter
Q27

Which of the units of the following physical qualities is not a derived unit?

A

Magnectic flux

B

Tension

C

Electric charge

D

Mass

E

Frequency

Answer: A

Matter
Q28

When a paint brush is removed from clean water, the bristles of the brush are pulled together because of

A

the viscosity of the surrounding  air

B

the low density of water

C

surface tension forces

D

the weight of the brush bristles

E

the mass of the brush bristles

Answer: C

Matter
Q29

The diagram represents a portion of a micrometer screw gauge in which the horizontal is in milimeters . What is the reading on the instrument?

A

3.72 mm

B

3.50 mm

C

30 mm

D

3.28 mm

E

3.22 mm

Answer: E

Matter
Q30

Which of the following substances is most viscous at at room temperature?

A

Water

B

Alcohol

C

Petrol

D

Palm oil

E

Kerosine

Answer: D

Matter
Q31

Which of the following is a fundamental quantity?

A

Heat capacity

B

Electric current

C

Torque

D

Reactance

E

Density

Answer: B

Matter
Q32

Which of the following is a scalar quality?

A

Tension

B

Weight

C

Impulse

D

Upthrust

E

Distance

Answer: E

Matter
Q33

Which of the following is d derived unit? 

A

Ampere

B

Kilogramme

C

Second

D

Ohm

E

kelvin

Answer: D

Matter
Q34

Which of the follwoing is a scalar quality?

A

Momentum

B

Accleration

C

Displacement

D

Distance

E

Force

Answer: D

Matter
Q35

A barometer can be used in determining the

I. height of a mountain

Ii. depth of mine

III. dew point.

Which of the following is/are correct?

A

I,II and III

B

II and III only

C

I and III only

D

I and II only

E

III only

Answer: D

Matter
Q36

Which of the following instruments is used to measure relative humidity?

A

Hydrometer

B

Barometer

C

Manometer

D

Hypsometer

E

Hygrometer

Answer: E

Matter
Q37

The product PV where P is pressure and V is volume has the same unit as

A

power

B

work

C

acceleration

D

impulse

E

force

Answer: B

Matter
Q38

The unit of stress is 

A

Nm

B

N

C

 

Nm-2

 

D

 

Nm2

 

E

Nm-1

Answer: C

Matter
Q39

Which of the following instruments is suitable for making the most accurate measurement of the internal diameter of a test tube?

A

Metre rule

B

A pair of callipers

C

A micrometer screw guage

D

A tape rule

E

A set square

Answer: C

Matter
Q40

Which of the following particles conduct electricity through salty water?

A

Atoms

B

Molecules

C

Electrons

D

Neutrons

E

Ions

Answer: E

Matter
Q41

When the pressure of gas in a discharge tube is gradually lowered

I   there is a violet glow in the tube

II  the glow in the tube splits into bands which get further apart

III the glow and the bands eventually disappear and there is a green flourescent in the tube

IV the tube breaks into pieces.

Which of the following is correct?

A

I and II only

B

I and III only

C

I and IV only

D

I, II and III only

E

I, II, III and IV

Answer: B

Matter
Q42

Which of the following is not a vector quantity?

A

Momemtum

B

Force

C

Velocity

D

Temperature

E

Displacement

Answer: D

Matter
Q43

Which of the following is used to determined relative density of the acid in a car battery?

A

Hypsometer

B

Hygrometer

C

Manometer

D

Hydrometer

E

Spectrometer

Answer: D

Matter
Q44

Which of the following is a derived unit?

A

Metre

B

Coulomb

C

Kilogram

D

Second

E

Ampere

Answer: B

Matter
Q45

Which of the following will not lower the surface tension of water?

A

Detergent

B

Methylated spirit

C

Soap solution

D

Grease

E

Camphor

Answer: B

Matter
Q46

Which of the following statement about the gaseous state of matter is not correct? The molecules of substance in gaseous state

A

are in constant state of motion

B

have different speed

C

have a temperature which is a measure of the average kinetic energy

D

have no intermolecular attractive force

E

have a pressure which is determined by the number of molecules present

Answer: E

Matter
Q47

When sugar at the buttom of a glass of water gradually dissolves, the water level does not change appreciably, Which of the following statements best explains this?

A

Water is a suitable solvent for sugar

B

The sugar and water have become a single solution

C

The volume of water molecules does not change when the sugar dissolves

D

Sugar molecules are smaller than water molecules

E

Water molecules are separated by large spaces between them

Answer: C

Matter
Q48

Which of the following explains the concave meniscus of water in a tube?

A

The adhesion between water and glass is greater than the cohesion between water molecules

B

The cohesion between water molecules is greater than the adhesion between glass and water

C

The molecules of water near the glass are moving faster than the molecules in the other parts

D

The molecules of water at the water-air boundary are often attracted to the centre of the tube

E

The weight of the water pulls the central part of the surface down

Answer: E

Matter
Q49

The unit of inductance is the

A

farad

B

henry

C

hertz

D

ampere

E

coulomb

Answer: B

Matter