SPEED TEST 10
Type: Custom Test Questions: 135 Total Marks: 540 Difficulty: Easy, Medium
Topics covered
Physics
Thermal Properties of Matter - Measurement of Temperature, Ideal-gas Equation and Absolute Temperature, Thermal Expansion,
Calorimetry, Heat Transfer, Newton’s Law of Cooling, Miscellaneous Problems on Thermal Properties of Matter
Biology
Body Fluids and Circulation - Blood, Blood Groups, Coagulation of Blood, Lymph (Tissue Fluid), Circulatory Pathways, Human Circulatory
System, Cardiac Cycle, ECG, Double Circulation, Regulation of Cardiac Activity, Disorders of Circulatory System
Breathing and Exchange of Gases - Respiratory Organs, Mechanism of Breathing, Respiratory Volumes and Capacities, Exchange of
Gases, Transport of Gases, Regulation of Respiration, Disorders of Respiratory System
Respiration in Plants - Introduction, Breathing in Plants, Glycolysis, Fermentation, Aerobic Respiration, Tricarboxylic Acid Cycle, Electron
Transport System (ETS) and Oxidative Phosphorylation, The Respiratory Balance Sheet, The Amphibolic Pathway, Respiratory Quotient
1. Assertion: While measuring the thermal conductivity of liquid 4. The thermal conductivity of brick is 1.7 W m
−1
K
−1
, and
experimentally, the upper layer is kept hot and the lower that of cement is 2.9 W m −1
K
−1
. What thickness of cement
layer kept cold.
will have same insulation as the brick of thickness 20 cm.
Reason: This avoids heating of liquid by convection. (1) 34.12 cm
(1) Both Assertion and Reason are correct and Reason is the (2) 26.18 cm
correct explanation of the Assertion.
(3) 14.18 cm
(2) Both Assertion and Reason are correct but Reason is not
the correct explanation of the Assertion. (4) 29.3 cm
(3) Assertion is correct but Reason is incorrect.
5. Read the Statement - A and Statement - B carefully to mark
(4) Assertion is incorrect but reason is correct. the correct option given below:
2. Read the Statement - A and Statement - B carefully to mark The rate of heat loss of a Newton's Law of Cooling is
the correct option given below: body according to Newton's effective for describing the
Law of Cooling can be rate of heat loss of a body in
For large temperature Newton's Law of Cooling
described by the formula . a vacuum.
differences between a body applies regardless of the
and its surroundings, temperature difference (1) Both Statement A and Statement B are true.
Newton's Law of Cooling is between the body and the
(2) Statement A is true, but Statement B is false.
not a valid approximation. surroundings.
(3) Statement A is false, but Statement B is true.
(1) Both Statement A and Statement B are true. (4) Both Statement A and Statement B are false.
(2) Statement A is true, but Statement B is false.
6. Two rods of equal length and diameter have thermal
(3) Statement A is false, but Statement B is true.
conductivities 3 and 4 units respectively. If they are joined in
(4) Both Statement A and Statement B are false. series, the thermal conductivity of the combination in the
given units would be:
3. For an ideal gas at a temperature of ∘
27 C and at constant
(1) 3.43
pressure, the coefficient of volume expansion is nearly
(2) 4.43
(1) 33 × 10
−5
K
−1
(3) 5.43
(2) 22 × 10
−4
K
−1
(4) 2.43
(3) 37 × 10
−5
K
−1
(4) 33 × 10
−4
K
−1
,7. A liquid of mass m and specific heat c is heated to a 11. A bimetallic strip consists of metals X and Y . It is mounted
temperature 2T . Another liquid of mass m/2 and specific rigidly at the base as shown. The metal X has a higher
heat 2c is heated to temperature T . If these two liquids are coefficient of expansion compared to that for metal Y . When
mixed, the resulting temperature of the mixture is: bimetallic strip is placed in a cold bath,
(1) (2/3)T
(2) (8/5)T
(3) (3/5)T
(4) (3/2)T
8. A wire of length L0 is supplied heat to raise its temperature
by T . If γ is the coefficient of volume expansion of the wire
and Y is young's modulus of the wire then the energy density (1) It will bend towards the right
stored in the wire is (2) It will bend towards the left
(1)
1
γ
2
T
2
Y
(3) It will not bend but shrink
2
1
(4) It will neither bend nor shrink
(2) γ
2
T
2
Y
3
3
2 2
12. Read the Statement - A and Statement - B carefully to mark
1 γ T
(3) the correct option given below:
18 Y
1
(4) γ
2
T
2
Y Black body radiation is The peak wavelength of
18
dependent on the black body radiation shifts to
9. If the sun's surface radiates heat at 7
6.3 × 10 W m
−2
. temperature of the black shorter wavelengths as the
Calculate the temperature of the sun assuming it to be a body, following the Stefan- temperature decreases,
black body (σ = 5.7 × 10 −8
Wm
−2
K
−4
)
Boltzmann law. according to Wien's
displacement law.
(1) 8.5 × 10
3
K
(2) 5.8 × 10
3
K
(1) Both Statement A and Statement B are true.
(2) Statement A is true, but Statement B is false.
(3) 5.3 × 10
8
K
(3) Statement A is false, but Statement B is true.
(4) 3.5 × 10
8
K
(4) Both Statement A and Statement B are false.
10. Two rods of same length and transfer a given amount of heat 13. Water equivalent of a body is measured in
in 12 second, when they are joined as shown in figure (1)
(1) m
3
But when they are joined as shown in figure(2) then they will
transfer same heat in same conditions in (2) kelvin
(3) kg
(4) calorie
14. Read the Assertion and Reason carefully to mark correct
option given below:
Assertion: Black bodies are ideal emitters and absorbers of
thermal radiation.
Reason: A black body absorbs all incident electromagnetic
radiation, regardless of frequency or angle of incidence.
(1) Both Assertion and Reason are true and Reason is the
correct explanation of the Assertion.
(1) 24 s (2) Both Assertion and Reason are true but Reason is not the
correct explanation of the Assertion.
(2) 13 s
(3) Assertion is true but Reason is false.
(3) 15 s
(4) Assertion is false but Reason is true.
(4) 48 s
,15. A wheel is 80.3 cm in circumference. An iron tyre measures 20. The surface temperature of the sun which has maximum
80.0 cm around its inner face. If the coefficient of linear energy emission at 500 nm is 6000 K .The temperature of a
expansion for iron is 1.2 × 10
−5 ∘
C
−1
, the temperature of star which has maximum energy emission at 400 nm will be
the tyre must be raised by (1) 8500 K
(1) 417 C
∘
(2) 4500 K
(2) 105 C
∘
(3) 7500 K
(3) 223 C
∘
(4) 6500 K
(4) 312 C
∘
21. I. Convection is a mode of heat transfer by actual motion of
16. Assertion: A solid and hollow sphere of same diameter and matter.
same material when heated through the same temperature II. Convection is possible only in gases.
will expand by the same amount III. Convection can be natural or forced.
Which of the following statement(s) is/are correct?
(1) Only I
Reason: The change in volume is independent of the original (2) Both I and III
mass but depends on original volume.
(3) Only II
(1) Both Assertion and Reason are correct and Reason is the (4) I, II, and III
correct explanation of the Assertion.
(2) Both Assertion and Reason are correct but Reason is not 22. The unit of thermal conductivity is :
the correct explanation of the Assertion. (1) J mK
−1
(3) Assertion is correct but Reason is incorrect.
(2) J m
−1
K
−1
(4) Assertion is incorrect but reason is correct.
(3) W mK
−1
17. A vessel is partly filled with a liquid. Coefficients of cubical (4) W m
−1
K
−1
expansion of material of vessel and liquid are γ and γ V L
respectively. If the system is heated, then volume unoccupied 23. A hot body is allowed to cool. The surrounding temperature is
by the liquid will necessarily constant at 30 ∘
C . The body takes time t to cool from 90
1
∘
C
(1) Remain unchanged if γ V
= γL to89 ∘
C and time t to cool from 60
2
∘
C to 59.5 ∘
C . Then,
(2) Increase if γ V
= γL (1) t 2 = 2t 1
(3) Decrease if γ V = γL (2) t 2 = t 1 /t 2
(4) None of the above (3) t 2 = 4t 1
18. 0.1 m
3
of water at 80 C
∘
is mixed with 0.3 m
3
of water at (4) t2 = t1
∘
60 C . The final temperature of the mixture is 24. The coefficient of linear expansion of an in homogeneous rod
(1) ∘
65 C changes linearly from α to α from one end to the other end
1 2
of the rod. The effective coefficient of linear expansion of rod
(2) ∘
70 C
is
(3) ∘
60 C
α1 + α2
(1)
(4) ∘
75 C 2
(2) α1 + α2
19. A Sealed glass jar is full of water. When it is kept in a freezing
(3) √α 1 α 2
mixture, it is broken because
(4) α1 − α2
(1) Water expands from4 ∘
C to 0 ∘
C
(2) Ice expands while melting 25. Colour of shining bright star is an indication of its
(3) Water expands due to freezing (1) Temperature
(4) Ice expands since its temperature falls below 0 ∘
C (2) Mass
(3) Size
(4) Distance
, 26. The coefficient of cubical expansion of mercury is 31. Ratio among linear expansion coefficient (α), areal expansion
0.00018/ C and that of brass 0.00006/ C . If a barometer
∘ ∘
(β) and volume expansion coefficient (γ) is
having a brass scale were to read 74.5 cm at 30 ∘
C , find the
(1) 1 : 2 : 3
true barometric height at0 ∘
C . The scale is supposed to be
(2) 3 : 2 : 1
correct at 15 ∘
C .
(3) 2 : 3 : 1
(1) 74.122 cm
(4) 3 : 1 : 2
(2) 79.152 cm
(3) 42.161 cm
32. A cylinder A of a material of thermal conductivity K1 is
surrounded by a cylindrical shell of inner radius equal to the
(4) 142.39 cm
cylinder. The shell is made of a material of thermal
27. The quantities of heat required to raise the temperature of conductivity K2 . The two ends of the combined system are
two solid copper spheres of radii r1 and r 2 (r 1 = 1.5 r 2 ) maintained at two different temperatures. If the effective
4K 1 + 5K 2
through 1 K are in the ratio: thermal conductivity of the system is , find the
9
(1) 9/4 ratio of outer radius of the shell to the radius of the cylinder.
(2) 3/2
(3) 5/3
(4) 27/8
28. Two wires A and B of same length, same radius and same
Young's modulus are heated through the same range of
temperatures. If the coefficient of linear expansion of A is (1) 5/2
3/2 times that of B , then the ratio of the thermal stress (2) 5/3
produced in the two wires A and B is
(3) 3/2
(1) 2 : 3
(4) 2/3
(2) 9 : 4
33. Triple point of water is
(3) 4 : 9
(1) 273.16 F
∘
(4) 3 : 2
(2) 273.16K
29. A 210 W heater is used to heat 100 g of water. The time (3) 273.16 C
∘
required to raise the temperature of this water from 25 ∘
C to
(4) 273.16R
100 C
∘
is (specific heat capacity of water
= 4200 J /Kg −
∘
C ) 34. Two large holes are cut in a metal sheet. If this is heated,
distances AB and BC , (as shown)
(1) 100 s
(2) 125 s
(3) 150 s
(4) 200 s
30. Consider a compound slab consisting of two different
material having equal thickness and thermal conductivities K
(1) both will increase
and 2K respectively. The equivalent thermal conductivity of
(2) both will decrease
the slab is
(3) AB increases BC decreases
(1) 3K
4
(4) AB decreases, BC increases
(2) K
3
(3) √ 2K
2
(4) K
3
Type: Custom Test Questions: 135 Total Marks: 540 Difficulty: Easy, Medium
Topics covered
Physics
Thermal Properties of Matter - Measurement of Temperature, Ideal-gas Equation and Absolute Temperature, Thermal Expansion,
Calorimetry, Heat Transfer, Newton’s Law of Cooling, Miscellaneous Problems on Thermal Properties of Matter
Biology
Body Fluids and Circulation - Blood, Blood Groups, Coagulation of Blood, Lymph (Tissue Fluid), Circulatory Pathways, Human Circulatory
System, Cardiac Cycle, ECG, Double Circulation, Regulation of Cardiac Activity, Disorders of Circulatory System
Breathing and Exchange of Gases - Respiratory Organs, Mechanism of Breathing, Respiratory Volumes and Capacities, Exchange of
Gases, Transport of Gases, Regulation of Respiration, Disorders of Respiratory System
Respiration in Plants - Introduction, Breathing in Plants, Glycolysis, Fermentation, Aerobic Respiration, Tricarboxylic Acid Cycle, Electron
Transport System (ETS) and Oxidative Phosphorylation, The Respiratory Balance Sheet, The Amphibolic Pathway, Respiratory Quotient
1. Assertion: While measuring the thermal conductivity of liquid 4. The thermal conductivity of brick is 1.7 W m
−1
K
−1
, and
experimentally, the upper layer is kept hot and the lower that of cement is 2.9 W m −1
K
−1
. What thickness of cement
layer kept cold.
will have same insulation as the brick of thickness 20 cm.
Reason: This avoids heating of liquid by convection. (1) 34.12 cm
(1) Both Assertion and Reason are correct and Reason is the (2) 26.18 cm
correct explanation of the Assertion.
(3) 14.18 cm
(2) Both Assertion and Reason are correct but Reason is not
the correct explanation of the Assertion. (4) 29.3 cm
(3) Assertion is correct but Reason is incorrect.
5. Read the Statement - A and Statement - B carefully to mark
(4) Assertion is incorrect but reason is correct. the correct option given below:
2. Read the Statement - A and Statement - B carefully to mark The rate of heat loss of a Newton's Law of Cooling is
the correct option given below: body according to Newton's effective for describing the
Law of Cooling can be rate of heat loss of a body in
For large temperature Newton's Law of Cooling
described by the formula . a vacuum.
differences between a body applies regardless of the
and its surroundings, temperature difference (1) Both Statement A and Statement B are true.
Newton's Law of Cooling is between the body and the
(2) Statement A is true, but Statement B is false.
not a valid approximation. surroundings.
(3) Statement A is false, but Statement B is true.
(1) Both Statement A and Statement B are true. (4) Both Statement A and Statement B are false.
(2) Statement A is true, but Statement B is false.
6. Two rods of equal length and diameter have thermal
(3) Statement A is false, but Statement B is true.
conductivities 3 and 4 units respectively. If they are joined in
(4) Both Statement A and Statement B are false. series, the thermal conductivity of the combination in the
given units would be:
3. For an ideal gas at a temperature of ∘
27 C and at constant
(1) 3.43
pressure, the coefficient of volume expansion is nearly
(2) 4.43
(1) 33 × 10
−5
K
−1
(3) 5.43
(2) 22 × 10
−4
K
−1
(4) 2.43
(3) 37 × 10
−5
K
−1
(4) 33 × 10
−4
K
−1
,7. A liquid of mass m and specific heat c is heated to a 11. A bimetallic strip consists of metals X and Y . It is mounted
temperature 2T . Another liquid of mass m/2 and specific rigidly at the base as shown. The metal X has a higher
heat 2c is heated to temperature T . If these two liquids are coefficient of expansion compared to that for metal Y . When
mixed, the resulting temperature of the mixture is: bimetallic strip is placed in a cold bath,
(1) (2/3)T
(2) (8/5)T
(3) (3/5)T
(4) (3/2)T
8. A wire of length L0 is supplied heat to raise its temperature
by T . If γ is the coefficient of volume expansion of the wire
and Y is young's modulus of the wire then the energy density (1) It will bend towards the right
stored in the wire is (2) It will bend towards the left
(1)
1
γ
2
T
2
Y
(3) It will not bend but shrink
2
1
(4) It will neither bend nor shrink
(2) γ
2
T
2
Y
3
3
2 2
12. Read the Statement - A and Statement - B carefully to mark
1 γ T
(3) the correct option given below:
18 Y
1
(4) γ
2
T
2
Y Black body radiation is The peak wavelength of
18
dependent on the black body radiation shifts to
9. If the sun's surface radiates heat at 7
6.3 × 10 W m
−2
. temperature of the black shorter wavelengths as the
Calculate the temperature of the sun assuming it to be a body, following the Stefan- temperature decreases,
black body (σ = 5.7 × 10 −8
Wm
−2
K
−4
)
Boltzmann law. according to Wien's
displacement law.
(1) 8.5 × 10
3
K
(2) 5.8 × 10
3
K
(1) Both Statement A and Statement B are true.
(2) Statement A is true, but Statement B is false.
(3) 5.3 × 10
8
K
(3) Statement A is false, but Statement B is true.
(4) 3.5 × 10
8
K
(4) Both Statement A and Statement B are false.
10. Two rods of same length and transfer a given amount of heat 13. Water equivalent of a body is measured in
in 12 second, when they are joined as shown in figure (1)
(1) m
3
But when they are joined as shown in figure(2) then they will
transfer same heat in same conditions in (2) kelvin
(3) kg
(4) calorie
14. Read the Assertion and Reason carefully to mark correct
option given below:
Assertion: Black bodies are ideal emitters and absorbers of
thermal radiation.
Reason: A black body absorbs all incident electromagnetic
radiation, regardless of frequency or angle of incidence.
(1) Both Assertion and Reason are true and Reason is the
correct explanation of the Assertion.
(1) 24 s (2) Both Assertion and Reason are true but Reason is not the
correct explanation of the Assertion.
(2) 13 s
(3) Assertion is true but Reason is false.
(3) 15 s
(4) Assertion is false but Reason is true.
(4) 48 s
,15. A wheel is 80.3 cm in circumference. An iron tyre measures 20. The surface temperature of the sun which has maximum
80.0 cm around its inner face. If the coefficient of linear energy emission at 500 nm is 6000 K .The temperature of a
expansion for iron is 1.2 × 10
−5 ∘
C
−1
, the temperature of star which has maximum energy emission at 400 nm will be
the tyre must be raised by (1) 8500 K
(1) 417 C
∘
(2) 4500 K
(2) 105 C
∘
(3) 7500 K
(3) 223 C
∘
(4) 6500 K
(4) 312 C
∘
21. I. Convection is a mode of heat transfer by actual motion of
16. Assertion: A solid and hollow sphere of same diameter and matter.
same material when heated through the same temperature II. Convection is possible only in gases.
will expand by the same amount III. Convection can be natural or forced.
Which of the following statement(s) is/are correct?
(1) Only I
Reason: The change in volume is independent of the original (2) Both I and III
mass but depends on original volume.
(3) Only II
(1) Both Assertion and Reason are correct and Reason is the (4) I, II, and III
correct explanation of the Assertion.
(2) Both Assertion and Reason are correct but Reason is not 22. The unit of thermal conductivity is :
the correct explanation of the Assertion. (1) J mK
−1
(3) Assertion is correct but Reason is incorrect.
(2) J m
−1
K
−1
(4) Assertion is incorrect but reason is correct.
(3) W mK
−1
17. A vessel is partly filled with a liquid. Coefficients of cubical (4) W m
−1
K
−1
expansion of material of vessel and liquid are γ and γ V L
respectively. If the system is heated, then volume unoccupied 23. A hot body is allowed to cool. The surrounding temperature is
by the liquid will necessarily constant at 30 ∘
C . The body takes time t to cool from 90
1
∘
C
(1) Remain unchanged if γ V
= γL to89 ∘
C and time t to cool from 60
2
∘
C to 59.5 ∘
C . Then,
(2) Increase if γ V
= γL (1) t 2 = 2t 1
(3) Decrease if γ V = γL (2) t 2 = t 1 /t 2
(4) None of the above (3) t 2 = 4t 1
18. 0.1 m
3
of water at 80 C
∘
is mixed with 0.3 m
3
of water at (4) t2 = t1
∘
60 C . The final temperature of the mixture is 24. The coefficient of linear expansion of an in homogeneous rod
(1) ∘
65 C changes linearly from α to α from one end to the other end
1 2
of the rod. The effective coefficient of linear expansion of rod
(2) ∘
70 C
is
(3) ∘
60 C
α1 + α2
(1)
(4) ∘
75 C 2
(2) α1 + α2
19. A Sealed glass jar is full of water. When it is kept in a freezing
(3) √α 1 α 2
mixture, it is broken because
(4) α1 − α2
(1) Water expands from4 ∘
C to 0 ∘
C
(2) Ice expands while melting 25. Colour of shining bright star is an indication of its
(3) Water expands due to freezing (1) Temperature
(4) Ice expands since its temperature falls below 0 ∘
C (2) Mass
(3) Size
(4) Distance
, 26. The coefficient of cubical expansion of mercury is 31. Ratio among linear expansion coefficient (α), areal expansion
0.00018/ C and that of brass 0.00006/ C . If a barometer
∘ ∘
(β) and volume expansion coefficient (γ) is
having a brass scale were to read 74.5 cm at 30 ∘
C , find the
(1) 1 : 2 : 3
true barometric height at0 ∘
C . The scale is supposed to be
(2) 3 : 2 : 1
correct at 15 ∘
C .
(3) 2 : 3 : 1
(1) 74.122 cm
(4) 3 : 1 : 2
(2) 79.152 cm
(3) 42.161 cm
32. A cylinder A of a material of thermal conductivity K1 is
surrounded by a cylindrical shell of inner radius equal to the
(4) 142.39 cm
cylinder. The shell is made of a material of thermal
27. The quantities of heat required to raise the temperature of conductivity K2 . The two ends of the combined system are
two solid copper spheres of radii r1 and r 2 (r 1 = 1.5 r 2 ) maintained at two different temperatures. If the effective
4K 1 + 5K 2
through 1 K are in the ratio: thermal conductivity of the system is , find the
9
(1) 9/4 ratio of outer radius of the shell to the radius of the cylinder.
(2) 3/2
(3) 5/3
(4) 27/8
28. Two wires A and B of same length, same radius and same
Young's modulus are heated through the same range of
temperatures. If the coefficient of linear expansion of A is (1) 5/2
3/2 times that of B , then the ratio of the thermal stress (2) 5/3
produced in the two wires A and B is
(3) 3/2
(1) 2 : 3
(4) 2/3
(2) 9 : 4
33. Triple point of water is
(3) 4 : 9
(1) 273.16 F
∘
(4) 3 : 2
(2) 273.16K
29. A 210 W heater is used to heat 100 g of water. The time (3) 273.16 C
∘
required to raise the temperature of this water from 25 ∘
C to
(4) 273.16R
100 C
∘
is (specific heat capacity of water
= 4200 J /Kg −
∘
C ) 34. Two large holes are cut in a metal sheet. If this is heated,
distances AB and BC , (as shown)
(1) 100 s
(2) 125 s
(3) 150 s
(4) 200 s
30. Consider a compound slab consisting of two different
material having equal thickness and thermal conductivities K
(1) both will increase
and 2K respectively. The equivalent thermal conductivity of
(2) both will decrease
the slab is
(3) AB increases BC decreases
(1) 3K
4
(4) AB decreases, BC increases
(2) K
3
(3) √ 2K
2
(4) K
3
