1. The Monoclimax Theory was propounded by
a) E E Clements
b) C C Park
c) D V Ager
d) S J Gould
Answer. a) E E Clements;
The Monoclimax theory was propounded by Swiss botanist and geographer, Frederic Clements, in the early 20th century. This theory suggests that there is a single, stable climax community that will develop in a given area under the prevailing environmental conditions. It was a prominent ecological theory, although it has been largely debated and modified over time.
2. The working principle of a washing machine is
a) Centrifugation
b) Dialysis
c) Reverse Osmosis
d) Diffusion
Answer. a) Centrifugation;
Centrifugation: Centrifugation is a laboratory technique that uses centrifugal force to separate particles or substances from a liquid medium. It involves spinning a sample at high speeds in a centrifuge machine. The centrifugal force causes heavier particles to settle at the bottom of a container, allowing the separation of components based on their density or size.
Dialysis: Dialysis is a medical or laboratory process used to remove waste products and excess substances from the blood or a solution. It involves placing the solution or blood in a semipermeable membrane (dialysis membrane) and allowing the smaller molecules to pass through while retaining larger molecules. This is commonly used in kidney dialysis to filter blood in patients with kidney disease.
Reverse Osmosis: Reverse osmosis is a water purification process that uses a semipermeable membrane to remove impurities and particles from water. Pressure is applied to push water through the membrane, leaving behind contaminants, minerals, and salts. It's commonly used in desalination and water purification systems.
Diffusion: Diffusion is the process by which molecules or particles move from an area of high concentration to an area of low concentration. It occurs spontaneously and is driven by the random motion of particles. Diffusion is a fundamental concept in chemistry and biology and plays a crucial role in processes like gas exchange in cells and the mixing of substances in solutions.
3. It is more difficult to walk on the ice than on the road because:
a) Ice is harder than the road
b) The road is harder than the ice
c) Ice does not offer any reaction when we push it without a foot
d) Ice has a lesser friction than the road
Answer. d) Ice has a lesser friction than the road ;
Ice is often smooth and lacks the rough texture of a road's pavement. This smooth surface reduces friction, making it easier for your feet to slip, leading to a higher risk of losing balance and falling.
Ice has a lower coefficient of friction compared to the dry road surface. This means there is less grip between your shoes and the ice, making it harder to maintain traction.
4. Who among the following had performed the world's first heart transplant? ( UPPSC PYQ)
a) Dr. Venugopal
b) William Harvey
c) Christian Bernard
d) William Betrick
Answer. c) Christian Bernard had performed the world's first heart transplant.
The world's first successful heart transplant was performed by Dr. Christiaan Barnard, a South African cardiac surgeon. The historic surgery took place on December 3, 1967, at Groote Schuur Hospital in Cape Town, South Africa. Dr. Barnard and his surgical team transplanted the heart of a 25-year-old accident victim, Denise Darvall, into a 54-year-old man, Louis Washkansky, who suffered from heart failure.
This groundbreaking procedure marked a significant milestone in the history of medicine and opened the door to organ transplantation as a viable treatment option for patients with end-stage heart disease. Dr. Christiaan Barnard's pioneering work in heart transplantation earned him international recognition and changed the field of cardiac surgery forever.
5. Match List-I with List-II and select the correct answer from the code given below the lists-
List-I List-II
( Name of Scientist) ( Area of Work)
A. Birbal Sahni 1. Green Revolution
B. K.C. Mehta 2. Embryology
C. P. Maheshwari 3. Paleobotany
D. M.S. Swaminathan 4. Plant Pathology
Codes-
ABCD
a) 1234
b) 3421
c) 2134
d) 4321
Answer. b) 3421;
Birbal Sahni: Birbal Sahni was a renowned Indian paleobotanist (a scientist specializing in the study of fossil plants). He made significant contributions to the understanding of prehistoric plant life in India. The Birbal Sahni Institute of Palaeobotany in Lucknow, India, is named in his honor.
C.P. Maheshwari: C.P. Maheshwari was a renowned Indian botanist known for his work in plant physiology and biochemistry. He made significant contributions to understanding the physiological and biochemical processes in plants. His research had a substantial impact on the field of plant sciences in India.
M.S. Swaminathan: M.S. Swaminathan is a prominent Indian geneticist and agricultural scientist known as the "Father of the Green Revolution in India." His work in agricultural research and development led to increased crop yields and played a vital role in improving food security in India. He has received numerous awards and honors for his contributions to agriculture and sustainable development.
6. Which one is correctly matched? ( UPPSC PYQ)
a) Radio -Marconi
b) Scooter - F. G Otis
c) Lift - Karl Benz
d) Electric Fan- Gillet
Answer. a) Radio -Marconi;
Radio: The invention of the radio is attributed to multiple individuals and experiments over time. Guglielmo Marconi is often credited with developing the first practical wireless telegraph system, which laid the foundation for radio communication. However, many scientists and engineers contributed to the development of radio technology.
Scooter: The invention of the modern motorized scooter is not attributed to a single individual. It evolved over time with various designs and improvements. Some early versions of scooters date back to the early 20th century, with companies like Vespa and Lambretta playing a significant role in popularizing scooters in the mid-20th century.
Lift (Elevator): The modern passenger elevator, or lift, was developed and improved upon by several inventors. Elisha Otis is often credited with inventing the safety elevator in the mid-19th century. His design included a safety mechanism to prevent the elevator from falling if the hoisting rope failed. This invention revolutionized vertical transportation.
Electric Fan: The electric fan was developed through a series of innovations. Schuyler Skaats Wheeler is credited with inventing the first electric fan in the late 19th century. Over time, improvements in design and technology led to the electric fans we use today.
7. Match List I with List II and select the correct answer using the codes given below the lists: ( UPPSC PYQ)
List-I List-II
( Term/Theory ) ( Name of Scientist)
A. Genetics 1. Bateson. W
B. Theory of inheritance 2. G. Mendel
C. Mutation 3. Hugo de varies
D. Genes in Chromosomes 4. Morgan
Codes:
A B C D
a) 1 2 3 4
b) 4 3 2 1
c) 2 4 1 3
d) 3 1 4 2
Answer. a) 1 2 3 4
8. Which of the following particles has zero charge? ( UPPSC PYQ)
a) Positron
b) Neutrino
c) Electron
d) Alpha-particle
Answer. b) Neutrino;
Positron (e+): The positron is the antimatter counterpart of the electron, with the same mass but opposite charge. It has a positive electric charge, whereas the electron has a negative charge. When a positron encounters an electron, they can annihilate each other, releasing energy in the form of gamma rays.
Neutrino (ν): Neutrinos are incredibly light and electrically neutral subatomic particles. They belong to the family of leptons, like electrons. Neutrinos come in three flavors: electron neutrino (νe), muon neutrino (νμ), and tau neutrino (ντ). They interact very weakly with matter and are challenging to detect, making them elusive particles in many astrophysical and particle physics experiments.
Electron (e-): The electron is a fundamental negatively charged subatomic particle that orbits the nucleus of an atom. It carries a fundamental unit of negative electric charge and is involved in chemical reactions, electricity, and the structure of atoms.
Alpha Particles (α): Alpha particles are composed of two protons and two neutrons, making them essentially helium nuclei. They are relatively heavy and positively charged. Alpha particles are often emitted by certain radioactive materials during a process known as alpha decay. They have limited penetration capability and can be stopped by a sheet of paper or human skin but can be harmful if emitted within the body.
9. Which of the following particles are found largest in the Universe?
a) Positron
b) Neutrino
c) Electron
d) Alpha-particle
Answer. b) Neutrino
10. Electron particle was discovered by whom?
a) J.J. Thomson
b) Sir James Chadwick
c) Ernest Rutherford
d) Alexander Fleming
Answer. a) J.J. Thomson ( 1897)
The electron was discovered by Sir J.J. Thomson, also known as Joseph John Thomson, a British physicist. His groundbreaking work on the electron was instrumental in advancing our understanding of the structure of atoms and subatomic particles.
In 1897, J.J. Thomson conducted a series of experiments using cathode ray tubes. He observed that when a high voltage was applied to the tubes, they emitted a stream of negatively charged particles. Thomson called these particles "corpuscles," but they later became known as electrons. He determined that these electrons were much smaller and negatively charged, in contrast to the positively charged particles observed in the nucleus of atoms.
Thomson's discovery of the electron provided strong evidence for the existence of subatomic particles and the idea that atoms were not indivisible, as previously believed. This work laid the foundation for the development of atomic theory and our understanding of the structure of atoms, leading to the modern atomic model. Thomson's contribution to the field of physics earned him the Nobel Prize in Physics in 1906.
11. Proton particle was discovered by whom?
a) J.J. Thomson
b) Sir James Chadwick
c) Ernest Rutherford
d) Alexander Fleming
Answer. c) Ernest Rutherford ( 1909);
Ernest Rutherford is not credited with the discovery of the proton; rather, he made significant contributions to our understanding of atomic structure, including the nucleus and the presence of positively charged particles within it.
The discovery of the proton is attributed to Ernest Rutherford's colleagues, Ernest Marsden and Hans Geiger, under Rutherford's supervision. In the famous 1909 Geiger-Marsden experiment (also known as the Rutherford gold foil experiment), they bombarded a thin gold foil with alpha particles (helium nuclei). The surprising result was that some alpha particles were deflected at large angles, while most passed through the foil with minimal deflection.
12. Neutron particle was discovered by whom?
a) J.J. Thomson
b) Sir James Chadwick
c) Ernest Rutherford
d) Carl Anderson
Answer. b) Sir James Chadwick ( 1932);
The discovery of the neutron is indeed attributed to Sir James Chadwick, a British physicist. James Chadwick's discovery of the neutron in 1932 was a significant breakthrough in the field of nuclear physics.
In his experiments, Chadwick bombarded beryllium with alpha particles (helium nuclei) and observed that a previously unknown particle was emitted from the beryllium nuclei. This particle had no electric charge (electrically neutral), but it had mass, similar to that of a proton. Chadwick correctly identified this new particle as the neutron.
The discovery of the neutron was crucial for our understanding of atomic nuclei. It explained how neutral atoms could have a similar mass to the sum of their protons and electrons and resolved some of the issues in nuclear physics. The neutron, together with protons, forms the nucleus of an atom and plays a vital role in nuclear reactions and the stability of atomic nuclei. James Chadwick's work in discovering the neutron earned him the Nobel Prize in Physics in 1935.
13. Positron particle was discovered by whom?
a) J.J. Thomson
b) Sir James Chadwick
c) Ernest Rutherford
d) Carl Anderson
Answer. d) Carl Anderson;
The positron, a subatomic particle and the antimatter counterpart of the electron was indeed discovered by Carl D. Anderson, an American physicist. Carl Anderson's discovery of the positron in 1932 was a significant contribution to the field of particle physics.
In Anderson's experiments, he used a cloud chamber to study the tracks of cosmic rays. He observed the tracks of particles that curved in the opposite direction of electrons when subjected to a magnetic field, indicating that these particles had a positive charge. These positively charged particles were later identified as positrons, which have the same mass as electrons but carry a positive electric charge.
Carl Anderson's discovery of the positron provided strong evidence for the existence of antimatter and confirmed the theoretical predictions of physicist Paul Dirac, who had predicted the existence of antimatter particles in his work. The discovery of the positron was a crucial step in our understanding of particle physics and the nature of matter and antimatter. Anderson's work earned him the Nobel Prize in Physics in 1936.
14. Consider the following statements and conclusions that can be drawn from them. Choose the correct conclusion.
Statement: In starting a loaded cart, one has to push harder to keep it moving.
a) The weight of the moving object is less
b) The wheels tend to slip initially
c) There is less friction once the cart starts moving
d) Practice makes perfect
Answer. c) There is less friction once the cart starts moving
15. For every action there is an equal and opposite reaction. The Law was given by:
a) Newton
b) Albert Einstein
c) Bohr
d) Handane
Answer. a) Newton; Third Newton law, there is an equal and opposite reaction.
Sir Isaac Newton formulated three fundamental laws of motion that laid the foundation for classical mechanics and our understanding of how objects move. These laws are often referred to as Newton's Laws of Motion:
Newton's First Law (Law of Inertia): An object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced external force. In simpler terms, an object will not change its state of motion unless a force is applied to it.
Newton's Second Law (Law of Force and Acceleration): The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This law is often written as F = ma, where F represents the force applied to an object, m is its mass, and a is the resulting acceleration. It indicates that force is what causes an object to accelerate or change its velocity.
Newton's Third Law (Action-Reaction Law): For every action, there is an equal and opposite reaction. This law emphasizes that when one object exerts a force on another object, the second object exerts an equal force in the opposite direction. These paired forces act on different objects and do not cancel each other out because they act in opposite directions.
16. The leaning Tower of Pisa does not fall because-
a) It is tapered at the top
b) It covers a large base area
c) Its center of gravity remains at the lowest position
d) The vertical line through the center of gravity of the tower falls within its base.
Answer. d) The vertical line through the center of gravity of the tower falls within its base.
17. If the distance between the Earth and the sun were twice what it is now, the gravitational force exerted on the Earth by the sun would be
a) Twice as large as it is now
b) Four times as large as it is now
c) One-fourth of what it is now
d) Half of what it is now
Answer. c) One-fourth of what it is now
18. The two balls of iron and wood of the same weight dropped from the same height in the air, and then
a) They reach the ground ( Earth) at the same time
b) One falls first, another falls later
c) The wooden ball falls later
d) They reach the ground after some gap
Answer. c) The wooden ball falls later
19. The Earth travels in its orbit at a speed of approx 4,400 km per hour. Why do we not feel this high speed?
a) Because we are too small compared to the size of the earth.
b) Compared to the speed of the earth in its orbit, our speed is zero.
c) The Solar system as a whole is also moving.
d) The gravity of the earth constantly pulls us towards the earth's center.
Answer. b) Compared to the speed of the earth in its orbit, our speed is zero.
20. If the gravitational force of the earth suddenly disappears, which of the following will be the correct consequence?
a) The weight of an object will become zero but the mass will remain the same.
b) The mass of the object will become zero but the weight will remain the same.
c) Both the mass and the weight of the object will become zero
d) The Weight of an object will increase
Answer. a) The weight of an object will become zero but the mass will remain the same.
21. If a person sitting in a lift then when will he feel that his weight has increased?
a) When the lift going upward expeditiously
b) When the lift goes down expeditiously
c) Going upward with constant velocity
d) Going downward with constant velocity
Answer. a) When the lift going upward expeditiously
22. There is no atmosphere on the moon because-
a) It is near to the earth
b) It receives light from the sun
c) It revolves around the earth
d) The escape velocity of gas molecules on it is less than the root mean square velocity here.
Answer. d) The escape velocity of gas molecules on it is less than the root mean square velocity here.
23. The raindrops are spherical because-
a) They fall from a high height
b) The air has resistance
c) The water has a surface tension
d) None of the above
Answer. c) The water has a surface tension;
Surface tension is a physical property of the surface of a liquid that arises due to the cohesive forces between its molecules. It is defined as the force per unit length that acts at the interface between a liquid and a gas or between two immiscible liquids. Surface tension is typically measured in units of force per unit length, such as newtons per meter (N/m) or dynes per centimeter (dyn/cm).
24. Oil spreads on the water surface because-
a) Oil is denser than water
b) Oil is less dense than water
c) The surface tension of oil is more than water
d) The surface tension of oil is less than water
Answer. d) The surface tension of oil is less than water
25. Pressure inside soap bubbles is -
a) More than atmospheric pressure
b) Less than atmospheric pressure
c) Equal to atmospheric pressure
d) Half of the atmospheric pressure
Answer. a) More than atmospheric pressure
26. While traveling by plane, the ink of the pen starts to come out
a) Due to a decrease in air pressure
b) Due to an increase in air pressure
c) Due to the increase in volume of ink
d) Due to excessive load
Answer. a) Due to a decrease in air pressure
27. A sudden fall in barometer reading indicates that the weather will be:
a) Stormy weather
b) Rainy weather
c) Cool dry weather
d) Hot and humid weather
Answer. a) Stormy weather
28. 200 gm of water is filled in a weightless balloon. Its weight in water will be
a) Zero
b) 100 gm
c) 200 gm
d) 400 gm
Answer. a) Zero
29. While floating in a sea what part of an iceberg is above the surface of the sea?
a) 1/9
b) 1/10
c) 1/6
d) 1/4
Answer. a) 1/9
30. When a ship enters the sea from a river, what happens?
a) It rises a little
b) It remains at the same level
c) It sinks a little
d) It immersed in the bottom of the sea
Answer. a) It rises a little
31. Assertion A- When a ship enters a sea from a river, it rises a little.
Reason-R- The density of seawater is greater than that of river water.
In the context of the above statement, which of the following is true.
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A
c) A is true but R is false
d) A is false but R is true
Answer. a) Both A and R are true, and R is the correct explanation of A.
32. Which of the following pairs is not correctly matched?
a) Discovery of Messan- Hideki Yukawa
b) Discovery of positrons - CD Anderson and U.F. Hess
c) Energy in the sun and stars principle of Production - H.A Bethe
d) Synthesis of Parauranium Elements- Enrico Fermi
Answer. d) Synthesis of Parauranium Elements- Enrico Fermi ( It was discovered by Madam Curie)
33. Which of the following is not correct?
a) The theory of evolution was formulated by Charles Darwin
b) Fractionation of the nucleus of an atom is called fusion
c) Dry ice is nothing but solid carbon dioxide
d) The telephone was discovered by Graham Bell
Answer. b) Fractionation of the nucleus of an atom is called fusion
34. Consider the following statements
Statement ( A): Ernest Rutherford said before the Royal Society that nuclear power would never be available to man.
Reason ( B): He believed that the law of Einstein would fail and quantity would not be converted into energy
Select your answer from the code scheme given below:
a) Both A and R are true, and R is the correct explanation of A
b) Both A and R are true, but R is not the correct explanation of A.
c) A is true, but R is false
d) A is false, but R is true
Answer. a) Both A and R are true, and R is the correct explanation of A
35. The first computer was made by
a) Bill Gates
b) Bill Clinton
c) Charles Babbage
d) Marconi
Answer. c) Charles Babbage
36. The Photoelectric effect was discovered by
a) Darvin
b) Einstein
c) Plank
d) Bohr
Answer. b) Einstein
37. Einstein was honored with the Nobel Prize for
a) Photoelectric effect
b) Theory of Specific Heat
c) Special Theory of relativity
d) Bose-Einstein Statistics
Answer. a) Photoelectric effect
38. The National Science Day is observed on February 28 every year to commemorate
a) Raman-effect day
b) The launch of the first artificial satellite Aryabhata
c) The successful launch of ASLV
d) Homi J Bhabha's birthday
Answer. a) Raman-effect day
39. India celebrates National Science Day on
a) June, 5
b) December, 22
c) February, 28
d) June, 30
Answer. c) February, 28
40. Who among the following Scientists propounded the New Theory of Relativity?
a) J. V. Narlikar
b) M. M. Krishnan
c) S. Chandrashekhar
d) B. D. Nag Chaudhari
Answer. a) J. V. Narlikar
41. The Homi Bhabha Award is given for special contribution in the field of -
a) Theoretical Physics
b) Nuclear Energy
c) Laser Physics
d) Space Research
Answer. b) Nuclear Energy
42. Who is not a Nobel Prize winner among the following scientists?
a) Har Govind Khorana
b) C. V. Raman
c) S. Chandrashekhar
d) Jagdish Chandra Bose
Answer. d) Jagdish Chandra Bose
43. The principle of Thermal Ionisation is an outstanding contribution of
a) H. J. Bhabha
b) M. N. Saha
c) C. V. Raman
d) J. C. Bose
Answer. b) M. N. Saha
44. Who among the following is the world's First Woman cosmonaut?
a) Bachendri Pal
b) Junko Tabei
c) Valentina Tereshkova
d) Sally Ride
Answer. c) Valentina Tereshkova
45. The first Indian station set up for Antarctic research was called
a) Dakshin Gangotri
b) Dakshini Yamunotri
c) Antarctica
d) Godavari
Answer. a) Dakshin Gangotri
46. Increasing the amount of a substance does not changes
a) Volume
b) Weight
b) Mass
d) Density
Answer. d) Density
48. Why does an iron needle float on mercury while it sinks in water?
a) Due to less chemical interaction between iron with mercury than there is with water
b) Iron is heavier than water and lighter than mercury
c) Iron has greater density than water and less than mercury
d) Mercury is heavier than water
Answer. c) Iron has greater density than water and less than mercury
49. An iron needle floats on the surface of water due to
a) Due to the buoyant force of water
b) Due to surface tension
c) Due to Viscosity
d) Due to Gravitational force
Answer. b) Due to surface tension
50. When lifting a bucket of water from a well, we feel that the bucket.
a) Becomes heavier above the surface of water
b) Becomes lighter above the surface of water
c) Loses stability on coming out of the water
d) Has gained mass on coming out of water
Answer. a) Becomes heavier above the surface of water
51. Match List 1 with List 2
List I List II
A. Technology Day 1. 9 August
B. Photography Day 2. 29 August
C. National Sports Day 3. May 11
D. Nagasaki Day 4. August 19
Code:
A B C D
a) 3 4 2 1
b) 4 3 2 1
c) 4 3 1 2
d) 3 4 1 2
Answer. a) 3 4 2 1
52. The mutation theory of evolution was enunciated by
a) Huxley
b) Darwin
c) Lamarck
d) Hugo de Vries
Answer. d) Hugo de Vries
53. The weight of a body is maximum at
a) Same as every place on earth's surface
b) Maximum at poles
c) More on the equator
d) More on mountains than in planes
Answer. b) Maximum at poles
54. Which of the following is the maximum weight of a body?
a) Wind
b) Water
c) Hydrogen
d) Nitrogen
Answer. c) Hydrogen
55. The weight of the human body is
a) Maximum at the poles
b) Same at every place on the earth's surface
c) Maximum at the equator
d) More on the mountains than places
Answer. a) Maximum at the poles
56. Which of the following is in the matched order-
A. Radium 1. Alexander Fleming
B. Penicillin 2. Madam Curie
C. X-ray 3. Edward Jenner
D. Smallpox 4. W.C Rontgen
Code:
A B C D
a) 2 1 4 3
b) 2 3 4 1
c) 3 4 1 2
d) 4 1 2 3
Answer. a) 2 1 4 3
57. The theory of "Black Hole" was propounded by
a) C V Raman
b) H J Bhabha
c) S Chandrashekhar
d) H Khurana
Answer. c) S Chandrashekhar
58. Carbon Nanotubes were prepared by
a) Fuller
b) Iijima
c) Faraday
d) Raman
Answer. b) Iijima
59. In India, the water desalination plant is located in
a) Lakshadweep
b) Goa
c) Cuttack
d) Chennai
Answer. a) Lakshadweep
60. The technology used to obtain liquid oxygen or liquid hydrogen at an industrial level is called
a) Pyrotechnics
b) Pyrometry
c) Hydroponics
d) Cryogenics
Answer. d) Cryogenics
61. Smokescreen is used in warfare for the purpose of concealment and camouflage. Smoke screens generally consist of fine particles of
a) Sodium Chloride
b) Silver Iodide
c) Titanium Oxide
d) Magnesium Oxide
Answer. c) Titanium Oxide
62. Which one of the following is incorrect?
a) The theory of evolution was propounded by Charles Darwin
b) The breaking apart of the nucleus of an atom is called fusion.
c) Dry ice is nothing but solid carbon dioxide
d) Telephone was invented by Graham Bell
Answer. b) The breaking apart of the nucleus of an atom is called fusion.
63. Match List I with List II and select the correct answer using the codes given below the lists:
List I List II
A. Frayon 1. Antinock factor
B. Tetraethyl Lead 2. Refrigerant
C. Benzene Hexachloride 3. Fire extinguisher
D. Carbon tetrachloride 4. Insecticide
Codes:
A B C D
a) 1 2 3 4
b) 3 2 1 4
c) 4 1 2 3
d) 2 1 4 3
Answer. d) 2 1 4 3
64. The machine Gun was invented by
a) J.L. Baird
b) G. Brousa
c) Karl Benz
d) James Puckle
Answer. d) James Puckle
65. The telescope was invented by
a) Galileo
b) Gutenberg
c) Edison
d) Graham Bell
Answer. a) Galileo
66. Wilhelm Roentgen invented
a) Radio
b) X-RAY Machine
c) Electric Bulb
d) Electric Motor
Answer. b) X-RAY Machine
67. The GAS engine was invented by
a) Diesel
b) Davy
c) Daimler
d) Charles
Answer. c) Daimler
68. Which one of the following pairs is not correctly matched?
a) James Watt: Steam Engine
b) A. G. Bell: Telephone
c) J. L Baird: Television
d) J. Perkins: Penicillin
Answer. d) J. Perkins: Penicillin
69. Which of the following is in the matched order--
A. Radium 1. Alexander Fleming
B. Penicillin 2. Madam Curie
C. X-RAY 3. Edward Jenner
D. Chickenpox 4. W. K. Roentgen
Codes:
A B C D
a) 2 1 4 3
b) 2 3 4 1
c) 3 4 1 2
d) 4 1 2 3
Answer. a) 2 1 4 3
70. Match List I with List II and select the correct answer using the codes given below the lists:
List-I List II
( Scientific ) (Invention)
A. Alfred Noble 1. Principle of Development
B. Alexander Fleming 2. Dynamite
C. Charles Darwin 3. Penicillin
D. Madame Curie 4. Radiation Characterization
Codes:
A B C D
a) 1 2 3 4
b) 2 3 1 4
c) 3 2 1 4
d) 1 4 3 2
Answer. b) 2 3 1 4
71. "I am a citizen of the Milky Way". the above statement is attributed by
a) Archana Sharma
b) Kalpana Chawala
c) Satish Dhawan
d) Vikram Sarabhai
Answer. b) Kalpana Chawala
72. The laws of Planetary motion were enunciated by
a) Newton
b) Kepler
c) Galileo
d) Copernicus
Answer. b) Kepler
73. "Cytotron" is the device by which is produced
a) Electrical energy
b) Artificial climate
c) Sound
d) Picture on the Screen
Answer. b) Artificial climate
74. Waterjet technology is used for
a) Irrigation
b) Drilling of mines
c) Firefighting
d) Mob Control
Answer. b) Drilling of mines
75. The laser beam is used for
a) Treatment of cancer
b) Treatment of Heart
c) Treatment of eye
d) treatment of kidney
Answer. c) Treatment of eye
76. The constitution of atomic Nucleaus are
a) Electron and Proton
b) Electron and Neutron
c) Proton and Neutron
d) Proton, Neutron, and Electron
Answer. c) Proton and Neutron
77. In the atom, Neutron was discovered by
a) J J Thomson
b) Chadwick
c) Rutherford
d) Newton
Answer. b) Chadwick
78. Which one of the following pairs constitutes a particle-antiparticle pair
a) Electron Positron
b) Proton Neutron
c) Photon Electron
d) Neutron Neutrino
Answer. a) Electron Positron
79. The atoms, in which the number of protons is the same but the number of neutrons is different, are known as
a) Isobars
b) Isomers
c) Isotones
d) Isotopes
Answer. d) Isotopes
80. The change of water into vapor is called
a) Natural
b) Physical
c) Chemical
d) Biological
Answer. b) Physical
81. The third allotrope of carbon was discovered by three scientists, who were awarded the Nobel Prize for chemistry. Find out who was not on that team
a) H W Kroto
b) R F Curl
c) R E Smalley
d) Faimen
Answer. d) Faimen
82. The process used for transforming salty water into pure water is called
a) Deliquescence
b) Efflorescence
c) Electric Separation
d) Reverse Osmosis
Answer. d) Reverse Osmosis
83. RDX was invented by
a) Alfred Nobel
b) Soddy
c) Bergillius
d) Henning
Answer. d) Henning
84. Refrigeration helps in food preservation by
a) Killing the germs
b) Reducing the rate of biochemical reactions
c) Destroying enzyme action
d) Sealing the food with a layer of ice
Answer. b) Reducing the rate of biochemical reactions
85.
Assertion ( A): Detergents easily remove oil and dirt from dirty clothes
Reason ( R): Detergents increase the surface tension of water
Codes:
a) (A) and ( R) are both correct, and (R) is the correct explanation of ( A)
b) (A) and ( R) are both correct, and (R) is not the correct explanation of ( A)
c) (A) is true, but (R) is false
d) (A) is false, but (R) is true
Answer. c) (A) is true, but (R) is false
86. Which one of the following pairs is not correctly matched?
a) Discovery of Messan: Hideki Yukawa
b) Discovery of positron: CD Andersen and U.F. Hess
c) Energy in Sun and stars: H A Bethe
d) Synthesis of Parauranium Elements: Enrico Fermi
Answer. d) Synthesis of Parauranium Elements: Enrico Fermi ( it was discovered by Madam Curies)
87.
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