SPEED TEST 9
Type: Custom Test Questions: 180 Total Marks: 720 Difficulty: Easy, Medium
Topics covered
Physics
Mechanical Properties of Fluids - Pressure, Fluid Flow, Equation of Continuity, Bernoulli’s Principle, Viscocity, Surface
Tension, Miscellaneous Problems in Mechanical Properties of Fluids
Chemistry
Redox Reactions - Oxidation and Reduction, Redox Reactions, Oxidation Number (Oxidation State), Types of Redox
Reactions, Balancing of Redox Reactions, Redox Reactions as the Basis for Titrations, Stoichiometry of Redox Reactions
in Solutions, Calculation of x-factor or Valency Factor and Equivalent Weight , Redox Titrations, Redox Reactions and
Electrode Processes, Applications of Redox Reactions, Miscellaneous questions on redox reactions
Biology
Plant Growth and Development - Growth & Phases of Growth, Growth Rates, Conditions for Growth, Differentiation,
Dedifferentiation & Redifferentiation, Development, Plant Growth Regulators, Auxins, Gibberellins, Cytokinins, Ethylene,
Abscisic Acid, Photoperiodism, Vernalisation, Seed Dormancy
1. A body weight 50 grams in air and 40 grams in 4. Work done in increasing the size of a soap bubble
water. How much would it weigh in a liquid of from a radius of 3 cm to 5 cm is nearly (Surface
specific gravity 1.5 ? tension of soap solution = 0.03 N m −1
)
(1) 65 grams
(1) 0.2 πmJ
(2) 45 grams
(2) 2πmJ
(3) 30 grams
(4) 35 grams (3) 0.4πmJ
(4) 4πmJ
2. Read the Statement - A and Statement - B carefully
to mark the correct option given below: 5. The dimensions of coefficient of viscosity is
Gauge pressure is the Atmospheric pressure is (1) ML
−1
T
−1
relevant measurement considered when (2) M LT
−1
in many practical calculating gauge
applications, such as tire pressure. (3) ML
−1
T
pressure. (4) ML
−2
T
−1
(1) Both Statement A and Statement B are true. 6. The rate of flow of a liquid through a capillary tube is
(2) Statement A is true, but Statement B is false. (1) Directly proportional to the length of the tube
(3) Statement A is false, but Statement B is true. (2) Inversely proportional to the difference of
(4) Both Statement A and Statement B are false. pressure between the ends of the tube.
3. If h is the height of capillary rise and r is the radius (3) Directly proportional to the 4
th
power of the
radius of the tube.
of the capillary tube, then which of the following
relation will be correct? (4) Independent of the nature of the liquid
(1) hr = constant
(2) h/r
2
= constant
(3) hr
2
= constant
(4) h/r = constant
,7. A stream lined body falls through air from a height 10. When a metallic sphere is dropped in a long column
on the surface of a liquid. Let d and D denote the of a liquid, the motion of the sphere is opposed by
densities of the materials of the body and the liquid the viscous force of the liquid. If the apparent weight
respectively. If D > d, then the time after which the of the sphere equals to the retarding forces on it, the
sphere moves down with a velocity called
body will be instantaneously at rest is
2h
(1) √ (1) Critical velocity
g
(2) Terminal velocity
(2) √
2h D
(3) Velocity gradient
g g
(4) Constant velocity
2h d
(3) √
11. Assertion: When the height of a tube is less than the
g D
liquid rise in the capillary tube, the liquid does not
d 2h overflow.
(4) √
(D − d) g
Reason: The product of the radius of the meniscus
8. Read the Statement - A and Statement - B carefully
and the height of the liquid in the capillary tube
to mark the correct option given below:
always remains constant.
A streamline represents In streamline flow, the (1) Both Assertion and Reason are correct and
the actual path traveled flow pattern does not Reason is the correct explanation of the
by a single fluid particle. change with time. Assertion.
(2) Both Assertion and Reason are correct but
(1) Both Statement A and Statement B are true.
Reason is not the correct explanation of the
(2) Statement A is true, but Statement B is false. Assertion.
(3) Statement A is false, but Statement B is true. (3) Assertion is correct but Reason is incorrect.
(4) Both Statement A and Statement B are false. (4) Assertion is incorrect but reason is correct.
9. Match the following columns based on Bernoulli’s 12. Read the Statement - A and Statement - B carefully
Principle and choose the correct option from codes to mark the correct option given below:
given below:
A liquid that does not Non-wetting liquids
wet a solid surface will have angles of contact
form droplets with an greater than 90 degrees.
acute angle of contact.
(1) Both Statement A and Statement B are true.
(2) Statement A is true, but Statement B is false.
(3) Statement A is false, but Statement B is true.
(4) Both Statement A and Statement B are false.
(1) A - P, B - Q, C - R, D - S
(2) A - R, B - P, C - S, D - Q
(3) A - S, B - R, C - Q, D - P
(4) A - Q, B - R, C - S, D - P
,13. Find the pressure at A just below the meniscus. 17. The weight indicated on a balance is X when a
beaker of water is placed on it. A solid object has
weight Y in air and displaces weight Z of water
when completely immersed.The given diagram
shows the object suspended from a light string and
completely immersed in the beaker of water. what is
the balance reading in the given arrangement ?
(1) P atm + ρgh
(2) P atm − ρgh
2T
(3) P atm + ρgh +
r
2T
(4) P atm +
r
14. A block of material with density 3g/cc is placed on a
fluid of density 7 g/cc. The fraction of the volume of
the block outside the fluid is
(1) 0.43
(2) 0.57
(3) 0.63
(4) 0.15
15. Water flows through a horizontal pipe of variable
cross section at the rate of 12 π litre per minute. The
velocity of the water at the point where the diameter (1) X
of the pipe becomes 2 cm is
(2) X + Z
(1) 6 ms
−1
(3) X + Y
(2) 8 ms
−1
(4) X + Y − Z
(3) 4 ms
−1
18. Spherical balls of radius ' R ' are falling in a viscous
(4) 2 ms
−1
fluid of viscosity ' η ' with a velocity ' v '. The
16. The height of water level in a tank of uniform cross retarding viscous force acting on the spherical ball is
section is 5 m. The volume of the water leaked in 5 s (1) Inversely proportional to both radius ' R ' and
through a hole of area 2.4 mm made at the bottom
2
velocity ' v '
of the tank is (Assume the level of the water in the
(2) Directly proportional to both radius ' R ' and
tank remains constant and acceleration due to
gravity = 10 ms ) −2 velocity ' v '
(3) Directly proportional to ' R ' but inversely
(1) 90 × 10
−6
m
3
proportional to ' v '
(2) 120 × 10
−6
m
3
(4) Inversely proportional to ' R ' but Directly
(3) 80 × 10
−6
m
3
proportional to velocity ' v '
(4) 40 × 10
−h
m
, 19. A horizontal pipe carries water in a streamlined flow. 23. A boat having a length of 3 meters and breadth 2
At a point along the pipe, where the cross-sectional meters is floating on a lake. The boat sinks by one
area is 10 cm
2
, the velocity of water is 1 ms
−1
and cm when a man gets on it. The mass of the man is
the pressure is 2000 P a. What is the pressure of (1) 62 kg
water at another point where the cross-sectional
(2) 60 kg
area is 5 cm ? [Density of water = 1000 kgm ]
2 −3
(3) 128 kg
(1) 300 P a
(4) 72 kg
(2) 400 P a
(3) 500 P a 24. Two non-mixing liquid of densities ρ and nρ(n > 1)
(4) 200 P a
are put in a container. The height of each liquid is h.
A solid cylinder of length L and density d is put in
20. Two soap bubbles of radii R1 and R2 are in this container. The cylinder floats with its axis
atmosphere of pressure P at constant temperature.
0 vertical and length pL(p < 1) in the denser liquid.
Ratio of masses of air inside them is The density d is equal to.
2T
(P o + )R 1
3
(1) {1 + (n + 1)p}ρ
R1
(1) (2) {2 + (n + 1)p}ρ
2T
3
(P o + )R
R2
2
(3) {2 + (n − 1)p}ρ
4T
(P o + )R
3
1
(4) {1 + (n − 1)p}ρ
R1
(2)
4T
3
25. A capillary tube of 2 mm diameter. What is the
(P o + )R 2
3
R2
height to which water rises, if surface tension of
R
(3) R
1
3 water is 7.4 × 10 N m and angle of contact is
−3 −1
2
2
∘
(4)
R
1 0 ?
2
R
2
(1) 0.25 mm
21. A good lubricant must have
(2) 1.51 mm
(1) High viscosity
(2) Low viscosity (3) 0.4 mm
(3) High density (4) 0.5 mm
(4) Low surface tension
26. A copper ball of radius 3.0 mm falls in an oil tank of
22. A bubble of 8 mm diameter is formed in the air. The viscosity 1 kg/ms . The terminal velocity of the
surface tension of soap solution is 30 dyne/cm. The copper ball will be (Density of oil
excess pressure inside the bubble is = 1.5 × 10
3
kg/m
3
, Density of copper
(1) 150 dyne/cm
2
= 9 × 10
3
kg/m
3
and g = 10 m/s .) 2
(2) 300 dyne/cm
2
(1) 18 × 10
−2
m/s
(3) 3
3 × 10 dyne/cm
2
(2) 25 × 10
−2
m/s
(4) 12 dyne/cm
2
(3) 15 × 10
−2
m/s
(4) 20 × 10
−2
m/s
Type: Custom Test Questions: 180 Total Marks: 720 Difficulty: Easy, Medium
Topics covered
Physics
Mechanical Properties of Fluids - Pressure, Fluid Flow, Equation of Continuity, Bernoulli’s Principle, Viscocity, Surface
Tension, Miscellaneous Problems in Mechanical Properties of Fluids
Chemistry
Redox Reactions - Oxidation and Reduction, Redox Reactions, Oxidation Number (Oxidation State), Types of Redox
Reactions, Balancing of Redox Reactions, Redox Reactions as the Basis for Titrations, Stoichiometry of Redox Reactions
in Solutions, Calculation of x-factor or Valency Factor and Equivalent Weight , Redox Titrations, Redox Reactions and
Electrode Processes, Applications of Redox Reactions, Miscellaneous questions on redox reactions
Biology
Plant Growth and Development - Growth & Phases of Growth, Growth Rates, Conditions for Growth, Differentiation,
Dedifferentiation & Redifferentiation, Development, Plant Growth Regulators, Auxins, Gibberellins, Cytokinins, Ethylene,
Abscisic Acid, Photoperiodism, Vernalisation, Seed Dormancy
1. A body weight 50 grams in air and 40 grams in 4. Work done in increasing the size of a soap bubble
water. How much would it weigh in a liquid of from a radius of 3 cm to 5 cm is nearly (Surface
specific gravity 1.5 ? tension of soap solution = 0.03 N m −1
)
(1) 65 grams
(1) 0.2 πmJ
(2) 45 grams
(2) 2πmJ
(3) 30 grams
(4) 35 grams (3) 0.4πmJ
(4) 4πmJ
2. Read the Statement - A and Statement - B carefully
to mark the correct option given below: 5. The dimensions of coefficient of viscosity is
Gauge pressure is the Atmospheric pressure is (1) ML
−1
T
−1
relevant measurement considered when (2) M LT
−1
in many practical calculating gauge
applications, such as tire pressure. (3) ML
−1
T
pressure. (4) ML
−2
T
−1
(1) Both Statement A and Statement B are true. 6. The rate of flow of a liquid through a capillary tube is
(2) Statement A is true, but Statement B is false. (1) Directly proportional to the length of the tube
(3) Statement A is false, but Statement B is true. (2) Inversely proportional to the difference of
(4) Both Statement A and Statement B are false. pressure between the ends of the tube.
3. If h is the height of capillary rise and r is the radius (3) Directly proportional to the 4
th
power of the
radius of the tube.
of the capillary tube, then which of the following
relation will be correct? (4) Independent of the nature of the liquid
(1) hr = constant
(2) h/r
2
= constant
(3) hr
2
= constant
(4) h/r = constant
,7. A stream lined body falls through air from a height 10. When a metallic sphere is dropped in a long column
on the surface of a liquid. Let d and D denote the of a liquid, the motion of the sphere is opposed by
densities of the materials of the body and the liquid the viscous force of the liquid. If the apparent weight
respectively. If D > d, then the time after which the of the sphere equals to the retarding forces on it, the
sphere moves down with a velocity called
body will be instantaneously at rest is
2h
(1) √ (1) Critical velocity
g
(2) Terminal velocity
(2) √
2h D
(3) Velocity gradient
g g
(4) Constant velocity
2h d
(3) √
11. Assertion: When the height of a tube is less than the
g D
liquid rise in the capillary tube, the liquid does not
d 2h overflow.
(4) √
(D − d) g
Reason: The product of the radius of the meniscus
8. Read the Statement - A and Statement - B carefully
and the height of the liquid in the capillary tube
to mark the correct option given below:
always remains constant.
A streamline represents In streamline flow, the (1) Both Assertion and Reason are correct and
the actual path traveled flow pattern does not Reason is the correct explanation of the
by a single fluid particle. change with time. Assertion.
(2) Both Assertion and Reason are correct but
(1) Both Statement A and Statement B are true.
Reason is not the correct explanation of the
(2) Statement A is true, but Statement B is false. Assertion.
(3) Statement A is false, but Statement B is true. (3) Assertion is correct but Reason is incorrect.
(4) Both Statement A and Statement B are false. (4) Assertion is incorrect but reason is correct.
9. Match the following columns based on Bernoulli’s 12. Read the Statement - A and Statement - B carefully
Principle and choose the correct option from codes to mark the correct option given below:
given below:
A liquid that does not Non-wetting liquids
wet a solid surface will have angles of contact
form droplets with an greater than 90 degrees.
acute angle of contact.
(1) Both Statement A and Statement B are true.
(2) Statement A is true, but Statement B is false.
(3) Statement A is false, but Statement B is true.
(4) Both Statement A and Statement B are false.
(1) A - P, B - Q, C - R, D - S
(2) A - R, B - P, C - S, D - Q
(3) A - S, B - R, C - Q, D - P
(4) A - Q, B - R, C - S, D - P
,13. Find the pressure at A just below the meniscus. 17. The weight indicated on a balance is X when a
beaker of water is placed on it. A solid object has
weight Y in air and displaces weight Z of water
when completely immersed.The given diagram
shows the object suspended from a light string and
completely immersed in the beaker of water. what is
the balance reading in the given arrangement ?
(1) P atm + ρgh
(2) P atm − ρgh
2T
(3) P atm + ρgh +
r
2T
(4) P atm +
r
14. A block of material with density 3g/cc is placed on a
fluid of density 7 g/cc. The fraction of the volume of
the block outside the fluid is
(1) 0.43
(2) 0.57
(3) 0.63
(4) 0.15
15. Water flows through a horizontal pipe of variable
cross section at the rate of 12 π litre per minute. The
velocity of the water at the point where the diameter (1) X
of the pipe becomes 2 cm is
(2) X + Z
(1) 6 ms
−1
(3) X + Y
(2) 8 ms
−1
(4) X + Y − Z
(3) 4 ms
−1
18. Spherical balls of radius ' R ' are falling in a viscous
(4) 2 ms
−1
fluid of viscosity ' η ' with a velocity ' v '. The
16. The height of water level in a tank of uniform cross retarding viscous force acting on the spherical ball is
section is 5 m. The volume of the water leaked in 5 s (1) Inversely proportional to both radius ' R ' and
through a hole of area 2.4 mm made at the bottom
2
velocity ' v '
of the tank is (Assume the level of the water in the
(2) Directly proportional to both radius ' R ' and
tank remains constant and acceleration due to
gravity = 10 ms ) −2 velocity ' v '
(3) Directly proportional to ' R ' but inversely
(1) 90 × 10
−6
m
3
proportional to ' v '
(2) 120 × 10
−6
m
3
(4) Inversely proportional to ' R ' but Directly
(3) 80 × 10
−6
m
3
proportional to velocity ' v '
(4) 40 × 10
−h
m
, 19. A horizontal pipe carries water in a streamlined flow. 23. A boat having a length of 3 meters and breadth 2
At a point along the pipe, where the cross-sectional meters is floating on a lake. The boat sinks by one
area is 10 cm
2
, the velocity of water is 1 ms
−1
and cm when a man gets on it. The mass of the man is
the pressure is 2000 P a. What is the pressure of (1) 62 kg
water at another point where the cross-sectional
(2) 60 kg
area is 5 cm ? [Density of water = 1000 kgm ]
2 −3
(3) 128 kg
(1) 300 P a
(4) 72 kg
(2) 400 P a
(3) 500 P a 24. Two non-mixing liquid of densities ρ and nρ(n > 1)
(4) 200 P a
are put in a container. The height of each liquid is h.
A solid cylinder of length L and density d is put in
20. Two soap bubbles of radii R1 and R2 are in this container. The cylinder floats with its axis
atmosphere of pressure P at constant temperature.
0 vertical and length pL(p < 1) in the denser liquid.
Ratio of masses of air inside them is The density d is equal to.
2T
(P o + )R 1
3
(1) {1 + (n + 1)p}ρ
R1
(1) (2) {2 + (n + 1)p}ρ
2T
3
(P o + )R
R2
2
(3) {2 + (n − 1)p}ρ
4T
(P o + )R
3
1
(4) {1 + (n − 1)p}ρ
R1
(2)
4T
3
25. A capillary tube of 2 mm diameter. What is the
(P o + )R 2
3
R2
height to which water rises, if surface tension of
R
(3) R
1
3 water is 7.4 × 10 N m and angle of contact is
−3 −1
2
2
∘
(4)
R
1 0 ?
2
R
2
(1) 0.25 mm
21. A good lubricant must have
(2) 1.51 mm
(1) High viscosity
(2) Low viscosity (3) 0.4 mm
(3) High density (4) 0.5 mm
(4) Low surface tension
26. A copper ball of radius 3.0 mm falls in an oil tank of
22. A bubble of 8 mm diameter is formed in the air. The viscosity 1 kg/ms . The terminal velocity of the
surface tension of soap solution is 30 dyne/cm. The copper ball will be (Density of oil
excess pressure inside the bubble is = 1.5 × 10
3
kg/m
3
, Density of copper
(1) 150 dyne/cm
2
= 9 × 10
3
kg/m
3
and g = 10 m/s .) 2
(2) 300 dyne/cm
2
(1) 18 × 10
−2
m/s
(3) 3
3 × 10 dyne/cm
2
(2) 25 × 10
−2
m/s
(4) 12 dyne/cm
2
(3) 15 × 10
−2
m/s
(4) 20 × 10
−2
m/s
