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JAMB questions for "Physics :: Liquids, Temperature and Pressure"
Q1

2kg of water is heated with a heating coil which draws 3.5 A from a 200 V mains for 2 minutes . What is the increase in temperature of the water?

A

10°C

B

15°C

C

25°C

D

30°C

E
Q2
I. Use a liquid with a high melting point  II. Use a liquid of high volume expansivity  III. Use a capillary tube of large diameter. Which of the above best describes how the sensitivity of a liquid-in-glass thermometer can be enhanced ?
A
II and III only
B
I and III only
C
II only
D
I only
E
Q3

A reservoir 500m deep is filled with a fluid of density  850 kgm-3 . If the atmospheric pressure is 1.05 x 105 Nm -2, the pressure at the bottom of the reservoir is

A

4.28 X 106 Nm-2

B

4.72  X 106 Nm-2

C

4.25  X 106 Nm3

D

4.36  X 106 Nm-3

E
Q4
The blade of hoe feels colder to touch in the morning than the wooden handle because the
A
blade is a better conductor of heat than the handle
B
handle is a better conductor of heat than the blade
C
blade is placed at a lower temperature than the handle
D
handle contains stored energy in form of heat
E
Q5
A clinical thermometer is different from other mercury  in glass thermometers owing to
A
its long stem
B
its wide range of temperatures
C
the constriction on its stem
D
the grade of mercury used in it
E
Q6
I. increase the melting point of the liquid  II. Increase the boiling point of the liquid  III. Decrease the melting point of the liquid  IV. Decrease the boiling point of the liquid  Which of the statements above about the effects of increase in pressure in a liquid are correct?
A
I and III only
B
III and IV only
C
I and II only
D
II and III only
E
Q7

An immersion heater rated 2.0 A, 240 V is used to boil water from temperature 52°C to 100°C. If the mass of the water is 2.5 kg, determine the time taken to boil the water

A

1.05   x 105s

B

1.05   x 104s

C

1.05   x 102s

D

1.05   x 103s

E
Q8

If the relative density of gold is 19.2, the volume of 2.4 kg of gold is

A

4.61 x 10-3m3

B

8.00  x 10-3m3

C

1.25  x 10-4m3

D

1.92  x 10-4m3

E
Q9
What is likely to happen if the glass of a thermometer expands more upon heating than a liquid inside?
A
The liquid will go down in the stem
B
The liquid will rise up in the stem
C
The glass will shrink
D
The glass will break
E
Q10
A drop of petrol makes finger colder than a drop of water would because
A
water has a higher surface tension than petrol
B
water is more viscous than petrol
C
petrol takes its latent heat of vapourization from the finger
D
petrol takes its latent heat of fusion from the finger
E
Q11
In a gas experiment, if the volume of the gas is plotted against the reciprocal of the pressure, the unit of the slope of the resulting curve is
A
work
B
temperature
C
power
D
force
E
Q12
A uniform solid cube material 10cm on each side of mass 700g is submerged in water. Which of the following best describes the behaviour of the cube in water?
A
The cube will melt after a period of time
B
The cube will sink in water
C
The cube will float
D
The cube will rest at an equilibrium position in water
E
Q13
At low humidity in an environment, the human skin in usually
A
damp and smooth
B
dry  and rough
C
damp and rough
D
dry and smooth
E
Q14
The thermometric  property of a constant volume thermometer is
A
differential expansion
B
change in volume
C
change in length
D
change in pressure
E
Q15
In an experiment to determine terminal velocity, as the pressure increases, the viscosity of a liquid
A
increases then decreases
B
increases
C
decreases
D
remains constant
E
Q16
In the diagram above, the pressure of the gas is
A
76cm of mercury
B
96cm of mercury
C
66cm of mercury
D
86cm of mercury
E
Q17

Two liquids L1 and L2 are contained in a U-tube. The height and the density of L1 are 8cm and 10kgm-3 respectively. If the density of L2 is 800kgm-3, its height measured from the same level is

A

8 cm

B

16 cm

C

12 cm

D

10 cm

E
Q18
When the temperature difference between the wet and dry bulbs of a hygrometer is high , this indicates that
A
B
there is plenty of sunshine
C
the relative humidity is low
D
the relative humidity is high
E
Q19
I. Reproducibility  II. Sensitivity  III. High thermal capacity  IV. High accuracy  The qualities of a good thermometer include
A
I, III and IV only
B
I , II  and IV only
C
II, III and IV only
D
I, II and III only
E
Q20

A 3 m3 volume of liquid W of density 200 kgm-3 is mixed with another liquid L of volume 7 m3 and density 150 kgm-3. The density of the mixture is

A

265 kgm-3

B

165 kgm-3

C

100 kgm-3

D

350 kgm-3

E
Q21
When very hot water is poured into two identical thin and thick glass tumblers in equal volumes, the thick one cracks because
A
of the even expansion of glass
B
glass is a good conductor of heat
C
of the uneven expansion of glass
D
glass is a crystal
E
Q22
A body of mass 36 kg fall through a viscous liquid which offers a drag force of 260N on the body. The upthrust on the body at terminal velocity is
A
310 N
B
50 N
C
620 N
D
100 N
E
Q23
As the pressure of a fluid increases, its viscosity
A
decreases
B
increase
C
increases then decreases
D
remains constant
E
Q24
When left in a freezer, a bottle full of water cracks on freezing  into ice because of the
A
increase in the volume of water
B
contraction of the bottle
C
expansion of the bottle
D
decrease in the volume of water
E
Q25

The change in volume when 450kg of ice is completely melted is

A

0.50 m3

B

0.45m3

C

0.05m3

D

4.50 m3

E
Q26
Water does not drop through an open umbrella of silk material unless the inside of the umbrella is touched. This is due to
A
osmotic pressure
B
capillarity
C
surface tension
D
viscosity
E
Q27
A test tube of radius 1.0cm is loaded to 8.8g. If it is placed upright in water , find the depth to which it would sink.
A
25.5 cm
B
2.8cm
C
28.0cm
D
5.2 cm
E
Q28

A hose of cross-sectional area 0.5m2 is used to discharge water from a water tanker at a velocity of 60ms-1 in 20s into a container . If the container is filled completely, the volume of the container is

A

600m3

B

6000m3

C

240m3

D

2400m3

E
Q29
The phenomenon whereby the water droplets in the atmosphere combine with dust particles in the air to reduce visibility is
A
fog
B
hail
C
mist
D
cloud
E
Q30

 T°C 0 5 10 15 40 60 S. V. P. (mmHg) 4.58 6.51 8.94 12.67 55.1 149

The table above shows the saturation vapour pressure against temperature in a certain town. If the vapour pressure in this town at 200C is 10mmHg, what is the relative humidity?

A

57.0%

B

17.5%

C

10.0%

D

170.0%

E
Q31

Which of the following is the correct shape of the velocity-time graph of a spherical steel ball dropped into a viscous fluid in a tall cylinder?

A
B
C
D
E
Q32

The hydrostatic blood pressure difference between the head and feet of a boy standing straight is 1.65 x 104 Nm-2. Find the height of the boy.

A

0.6m

B

0.5m

C

2.0m

D

1.5 m

E
Q33
A copper cube weighs 0.25 N in air, 0.17N when completely immersed in paraffin oil and 0.15N when completely immersed in water. The ratio of upthrust in oil to upthrust in water is
A
4:5
B
3 : 5
C
13 : 10
D
7 : 10
E
Q34

The pressure of 3 moles of an ideal gas at a temperature of 27°C having a volume of 10-3 m3  is

A

2.49 x 106Nm-2

B

7.47 x 106Nm-2

C

2.49 x 105Nm-2

D

7.47 x 105Nm-2

E
Q35
Water is a poor thermometric liquid because it
A
has low vapour pressure
B
is opaque
C
is a poor conductor
D
wets glass
E
Q36
The radiator of a motor car is cooled by
A
B
convection
C
conduction
D
E
Q37
The height at which the atmosphere ceases to exist is about 80km. If the atmosphere pressure on the ground level is 760 mm Hg , the pressure at a height of 20 km above the ground level is
A
570 mm Hg
B
480 mm Hg
C
380 mmHg
D
480 mmHg
E
190 mmHg
Q38
If a spherical metal bob of radius 3 cm is fully immersed in a cylinder containing water and the water level rises by 1cm, what is the radius of the cylinder
A
1 cm
B
3 cm
C
6 cm
D
12 cm
E
Q39
The thermometer substances  of an absolute thermometer is
A
mercury
B
platinum
C
alcohol
D
helium
E
Q40

The pressure of a given mass of a gas changes from 300Nm-2 to 120Nm-2 while the temperature drops from 127°C to 73°C. The ratio of the final volume to the initial volume is

A

5:4

B

5 : 2

C

4 :5

D

2 : 5

E
Q41

A gas with initial volume 2 x 10-6m3 is allowed to expand to six times its initial volume at constant pressure of 2 x 105 Nm-2. The work done is

A

1.2 J

B

2.0 J

C

4.0 J

D

12. J

E
Q42
Ice cubes are added to a glass and water are cooled by
A
conduction and convection
B
C
conduction only
D
convection only
E
Q43
I. Low pressure  II. High pressure III. High p.d IV. Low p.d   Which combination of the above is true of the conduction of electricity through gases?
A
I and III only
B
I and IV only
C
II and III only
D
II and IV only
E
Q44

 Day 1 Day 2 Day 3 Dry 30° 29°C 25°C Wet 22°C 22°C 21°C

The readings above are for three consecutive days from a wet and dry bulb hygrometer. It can be concluded that the relative humidity for the three days.

A

B

remained unchanged

C

was least on Day1

D

E
Q45
When a ship sails from salt water into fresh water, the fraction of its volume above the water surface will
A
remain the same
B
increase
C
decrease
D
increase then decrease
E
Q46

At a fixed point below a liquid surface, the pressure downward is P1 and the pressure upward is P2. It can be deduced that

A

P1= P2

B

P1  > P2

C

P1< P2

D

P1≥ P2

E
Q47
A quality of water at 0° is heated to about 30°C. At each degree rise in temperature, its density will
A
B
rise then fall
C
D
fall then rise
E
Q48
A thin wire heavy weighs attached to both ends is hung over a block of ice resting on two supports. If the wire cuts through the ice block while the block remains solid behind the wire, the process is called
A
fusion
B
sublimation
C
condensation
D
regelation
E
Q49

In a thermometer reaction,  the total initial mass is 5.02 x 10-27 kg and the total final mass is 5.01 x 10-27 kg. The energy released in the process is

A

9.0 x 10-10 J

B

9.0 x 10-11 J

C

9.0 X 10-12 J

D

9.0 x 10-13 J

E
Q50
The diagram beside shows a maximum and minimum thermometer divided into three portions P, Q, and R. Which of the following is true about the respective contents of P, Q and R?
A
Alcohol, Mercury, and Alcohol
B
Air, Alcohol, and Mercury
C
Mercury, Alcohol, and Mercury
D
Air, Mercury, and Alcohol
E
Q51
A solid weighs 10.0 N in air, 6.0 N when fully immersed in water and 7.0 N when fully immersed in a certain liquid X. Calculate the relative density of the liquid .
A
5/3
B
4/3
C
3/4
D
7/10
E
Q52
When the temperature of a liquid is increased, its surface tension
A
decreases
B
increases
C
remains constant
D
increases then decreases
E
Q53
A gas at a volume Vo in a container at pressure Po is compressed to one fifth of its volume. What will be its pressure if it maintains its original temperature T?
A
P/5°
B
4/5  Po
C
Po
D
5 P o
E
Q54
I. A liquid boils when its saturated vapour pressure is equal to the external pressure is equal to the external pressure II. Dissolved  substances in pure water lead to increase in the boiling point III. When the external pressure is increased, the boiling point increases IV. Dissolved substances in pure water decrease the boiling point  Which combination of the above are peculiarities of the boiling point
A
I, II and III
B
I, II, III and IV
C
I, II and IV
D
II, III and IV
E
Q55

The temperature gradient across a copper rod of  thickness 0.02m, maintained at two temperature junction of 20°C and 80°C respectively is

A

3.0 x 102 Km-1

B

3.0 X 103 Km-1

C

5.0 X 103 Km-1

D

3.0 X 104 Km-1

E
Q56

In the J-tube below, Y and X are on the same horizontal level and 30cm2 of air is trapped above Y when the atmospheric pressure is 75cm Hg. Calculate the volume of air trapped above Y when 15cm Hg is now poured into the limb above X.

A

15cm2

B

25cm2

C

35cm2

D

45cm2

E
Q57
Which of these statements are correct for the pressure in liquids? I. Pressure in a liquid at a point acts equally in  all directions II. Pressure increases with depth III. Pressure at a depth depends on the shape of the container IV. Pressures at the same depth in different liquids are propotional to the densities of the liquids
A
I,II and III only
B
I,II and IV only
C
I, III and IV only
D
II, III and IV only
E
Q58

The atmospheric pressure due to water is 1.3 x 106 Nm-2 . What is the total pressure at the bottom of an ocean 10 m deep?

A

1.3 X 107 Nm-2

B

1.4 X 106 Nm-2

C

1.4 X 105 Nm-2

D

1.0 X 105 Nm-2

E
Q59
A solid of weight 0.600 N is totally immersed in oil and water respectively. If the upthrust in oil is 0.210 N and the relative density of oil is 0.875, find the upthrust in water.
A
0.600 N
B
0.360 N
C
0.240 N
D
0.180 N
E
Q60
A platinum resistance theremometer records 3.0&#937; at 0° 8.0&#937; at 100°C. If it records 6.0&#937; in a certain evironment, the temperature of the medium is
A
80°C
B
60 °C
C
50°C
D
30°C
E