General Science Book In English - RRB NTPC, Group-D, SSC, WBCS, UPSC
General Science Book In English - RRB NTPC, Group-D, SSC, WBCS, UPSC
1. The working of the quartz crystal in the watch is based on the-
(A) Photoelectric Effect
(B) Johnson Effect
(C) Piezo-electric Effect
(D) Edison Effect
2. If a mouse of over eight times its normal size has been produced by introducing human growth hormonic gene, the technique invoIved is called-
(A) Hybridisation
(B) Genetic Engineering
(C) Mutation Breeding
(D) Hormonal Feeding
3. Poison glands of snakes are homologous to-
(A) Electric organs of fishes
(B) Stings of rays
(C) Sebaceous glands of mammals
(D) Salivary glands of vertebrates
4. Human body needs a constant supply of proteins to survive. The first part of the digestive system to begin digesting proteins is
(A) Mouth
(B) Stomach
(C) Small intestine
(D) Large intestine
5. Three communicable diseases prevalent in developing countries caused by unsafe drinking water and bad sanitation are-
(A) Acute diarrhoea, cancer and gout
(B) Malaria, acute diarrhoea and schistosos-miasis
(C) Onchocerciasis, leukaemia and arthritis
(D) Rheumatism, malaria and AIDS
6. Which one of the following is used for dating archaeological specimens in woods, bones and shells ?
(A) Uranium-238
(B) Argon isotope
(C) Carbon 14
(D) Strontium 90
7. The Government of India has totally banned the export of 'Burnt Coal' (Jhama) because it contains recoverable amount of a metal/ element used in transistors. Which one of the following is that element ?
(A) Phosphorus
(B) Germanium
(C) Silicon
(D) Tungsten
8. Which one of the following approaches comes under the category of bio-technology ?
(A) Use of living organisms or substances obtained from them, in industrial processes
(B) Modernizing the commercial industries to produce products for use in biological research
(C) Use of modern technology to investigate biological disorders
(D) Use of industrial technology to increase the biosphere
9. Which one of the following is correctly matched ?
(A) Dr. Kurien-Space Science
(B) Dr. Malcom-Co-operative Movement Adiseshiah
(C) Dr. Abdul Kalam-Development Economics
(D) Dr. Pramod Karan Sethi-Jaipur Foot
10. Which one of the following seeds can benefit a patient of diabetes mellitus by normalizing his blood sugar level ?
(A) Coriander seeds
(B) Mustard seeds
(C) Cumin seeds
(D) Fenugreek seeds
11. Scratching eases itching because-
(A) It removes the outer dust in the skin
(B) It kills the germs
(C) It stimulates certain nerves which direct the brain to increase the production of anti-histaminic chemicals
(D) It suppresses the production of enzymes which cause itching
12. Haemophilia is a hereditary disease carried by-
(A) Females and expressed by females
(B) Females and expressed by males
(C) Males and expressed by females
(D) Males and expressed by males
13. When was Chandrayaan-1 launched to study the surface of moon ?
(A) 22 October, 2007
(B) 22 October, 2009
(C) 22 October, 2006
(D) 22 October, 2008
14. The formation of brilliant colours in a thin soap film is a consequence of the phenomena of-
(A) Multiple reflection and interference
(B) Multiple reflection and dispersion
(C) Diffraction and dispersion
(D) Polarisation and interference
15. Camel uses its hump for-
(A) Storing water
(B) Storing fat
(C) Balancing the body during walking in desert sand
(D) Temperature regulation
16. Consider the two statements given below, one labelled as Assertion (A) and the other labelled as Reason (R)
Assertion (A): A mixture of salt and ice gives temperature below 0°C.
Reason (R): The salt raises the freezing point of ice.
In the context of the above two statements which one of the following is correct ?
(A) Both A and R are true and R is the correct explanation 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
17. Bio films are-
(A) Colour films used by biologists to photograph living organisms
(B) Photomicrographs of micro-organisms from various habitats
(C) Accumulations of micro-organisms at surfaces such as those of a rock, a tooth or an oil droplet
(D) Photographic films made through fermentation processes of certain industrial micro-organisms
18. At what temperature are the readings of a Centigrade and Fahrenheit thermometer the same ?
(A) -40
(B) 212
(C) 40
(D) 100
19. Which one of the following provides the best estimate of the world's biological diversity ?
(A) Of about ten million species probably alive today, some 20 species are lost everyday, most of them unknown be- cause not more than half a million have been actually identified by scientists
(B) Of about thirty million living species, some 50 are lost everyday, most of them unknown because not more than one million have been actually identified
(C) Of about fortyfive million living species, some 100 are lost everyday, most of them unknown because not more than 1:5 million have been actually identified
(D) Of about seventy five million living species, some 500 are lost everyday, most of them unknown because not more than 3 million have been actually identified
20. In many developing countries, three major causes of death and disease are-
(A) Lack of safe drinking water, increasing use of pesticides and thinning of the Ozone layer
(B) Contaminated food, global warning and industrial chlorofluorocarbons
(C) Polluted air, greenhouse effect and soil erosion
(D) Dirty water, contaminated food and polluted air
21. Vinegar is an aqueous solution of-
(A) Oxalic acid
(B) Citric acid
(C) Acetic acid
(D) Hydrochloric acid
22. When there is depletion of Ozone in the stratosphere, the wavelength of radiation striking the earth's surface will be-
(A) 10-10m
(B) 10-7m
(C) 10-2m
(D) 100m
23. In human body, the leg bones are
(A) Humerus and Femur
(B) Fibula and Tibia
(C) Fibula and Ulna
(D) Tibia and Radius
24. The organ in the body which accumulates iodine is
(A) Pituitary gland
(B) Thymus
(C) Thyroid gland
(D) Spleen
25. The theory of jumping genes was propounded by-
(A) Gregor Johann Mendel
(B) Thomas Hunt Morgan
(C) Barbara Mc Clintock
(D) Watson and Crick
26. Which one of the following is a "man made" cereal not found in nature ?
(A) Dwarf wheat
(B) Hybrid maize
(C) Triticale
(D) Soybean
27. The pitch of the voice of woman is in general-
(A) Higher than that of men
(B) Marginally lower than that of men
(C) Much lower than that of men
(D) The same as that of men
28. The heart of human embryo starts beating-
(A) In the first week of its development
(B) In the third week of its development
(C) In the fourth week of its development
(D) In the sixth week of its development
29. If father has blood group A and mother has blood group O, then which one of the following blood groups may be found in their son ?
(A) B
(B) AB
(C) O
(D) B, AB, or O
30. In an electronic watch, the component corresponding to pendulum of a pendulum clock is a-
(A) Transistor
(B) Crystal oscillator
(C) Diode
(D) Balance wheel
31. Life of RBC in human blood is of-
(A) 30 days
(B) 60 days
(C) 120 days
(D) 15 hours
32. Which sugar is present in considerable amount in the blood ?
(A) Glucose
(B) Fructose
(C) Galactose
(D) Sucrose
33. In the case of a 'Test-Tube Baby'-
(A) Fertilization takes place inside the test tube
(B) Development of the baby takes place incide the test-tube
(C) Fertilization takes place outside the mother's body
(D) Fertilized egg develops inside the test-tube
34. Which one of the following is in the correct sequential order in which these appeared under simulated primitive earth condition ?
(A) Methane, hydrogen cyanide, nitriles, aminoacids
(B) Hydrogen cyanide, methane, nitriles, aminoacids
(C) Aminoacids, nitriles, hydrogen cyanide, methane
(D) Nitriles, aminoacids, methane, hydrogen, cyanide
35. Which of the following is/are used as bio-fertilizers ?
1. Azolla
2. Blue-green algae
3. Alfalfa
Select the correct answer using the codes given below-
Codes:
(A) 2 alone
(B) 1 and 2
(C) 1 and 3
(D) 1,2 and 3
36. Even though an animals is fed with carbo- hydrate rich diet, its blood sugar concentration tends to remain constant. This is on account of the fact that in the case of an animal-
(A) Hormones of pituitary glands control metabolic process
(B) Hormones of pancreas cause such a condition
(C) Blood sugar is readily absorbed by liver
(D) Glucose undergoes autolysis
37. One mole of hydrogen gas burns in excess of oxygen to give 290 KJ of heat. What is the amount of heat produced when 4g of hydrogen gas is burnt under the same conditions?
(A) 145 KI
(B) 290 KJ
(C) 580 KJ
(D) 1160 KJ
38. If a gas is compressed to half of its original volume at 27°C, to what temperature should it be heated to make it occupy its original volume ?
(A) 327°C
(B) 600° C
(C) 54°C
(D) 300°C
39. Which of the following are characteristics shown by a breastfed baby when compared to a bottle fed baby ?
1. It is less obese
2. It shows greater capacity to resist disease
3. It gets more vitamins and proteins
4. Its growth in height is abnormal
Select the correct answer from the codes given below-
Codes:
(A) 1,2 and 3
(B) 1, 2 and 4
(C) 1,3 and 4
(D) 2, 3 and 4
40. The basic reason for the extraordinary sparkle of a suitably cut diamond is that-
(A) It has a very high transparency
(B) It has a very high refractive index
(C) It is very hard
(D) It has well defined cleavage planes
41. In the balanced dietaries for a day of an adult working man, weights of carbohydrate food and total protein food (both superior and inferior) should be in order of-
(A) 600 gm and 420 gm respectively
(B) 600 gm and 600 gm respectively
(C) 420 gm and 600 gm respectively
(D) 420 gm and 420 gm respectively
42. Which one of the following is caused by the expression of a recessive gene present on sex chromosome?
(A) Rheumatism
(B) Nervous dystrophy
(C) Muscular dystrophy
(D) Cerebral haemorrhages
43. Which one of the following animals stores water in intestine ?
(A) Moloch
B) Camel
(C) Zebra
(D) Uromastix
44. If water pollution continues at its present rate, it will eventually-
(A) Stop water cycle
(B) Prevent precipitation
(C) Make oxygen molecules unavailable to water plants
(D) Make nitrate unavailable to water plants
45. A corked bottle full of water when frozen will break because-
(A) The bottle contracts on freezing
(B) The volume of water decreases on freezing
(C) The volume of water increases on freezing
(D) Glass is a bad conductor of heat
46. The main constituents of pearl are-
(A) Calcium carbonate and magnesium carbonate
(B) Aragonite and conchiolin
(C) Ammonium sulphate and sodium carbonate
(D) Calcium Oxide and ammonium chloride
47. If safe storage is to be ensured, the moisture content of foodgrains at the time of harvesting should not be higher than-
(A) 14%
(C) 18%
(B) 16%
(D) 20%
48. The half-life of a radioactive element is 5 years. The fraction of the radioactive substance that remains after 20 years is-
(A) 1/2
(B) 1/4
(C) 1/8
(D) 1/16
49. Given below are two statements, one labelled as Assertion (A) and the other as Reason (R)-
Assertion (A): A lock of Einstein's hair if scientists could locate it an extract its DNA, could help in producing another Einstein by cloning.
Reason (R): The DNA extracted from the cell of an embryo at an early stage of development can be transferred to individual eggs which in turn can be implanted into the uterous of a surrogate mother to give birth to an identical offspring.
In the context of the above two statements which one of the following is correct ?
(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 a correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
50. Which one of the following vitamins is considered to be a hormone ?
(A) A
(B) B
(C) C
(D) D
51. Monazite is an ore of-
(A) Zirconium
(B) Thorium
(C) Titanium
(D) Iron
52. Galvanised iron sheets are protected from rusting due to the presence of a layer of-
(A) Lead
(B) Chromium
(C) Zinc
(D) Tin
53. Haemoglobin is dissolved in the plasma of-
(A) Frog
(B) Fish
(C) Man
(D) Earthworm
54. In recent years there has been some concern over the threat posed by the Mathura Oil Refinery and the Thermal Power Plants to the Taj Mahal in Agra. The scientific basis of any possible damage to the Taj is mainly-
(A) Stratospheric Ozone and the chlorofluorocarbons which destroy it
(B) Acid precipitation and Troposphe Ozone
(C) Increasing levels of atmospheric CO2 which produce the greenhouse effect
(D) Ultraviolet radiation (240-260 nanometers wavelength) and the fumes from the heavily polluted Yamuna river
55. Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in the building material ?
(A) Plutonium
(B) Thorium
(C) Radon
(D) Radium
56. A charged particle is at rest in a region where magnetic field and electric field are parallel. The particle will move in a-
(A) Straight line
(B) Circle
(C) Ellipse
(D) None of these
57. Water is a good solvent of ionic salts because-
(A) It has a high boiling point
(B) It has a high dipole moment
(C) It has a high specific heat
(D) It has no colour
58. The density of uranium is of the order of-
(A) 1017 kg/m3
(B) 1011 kg/m3
(C) 1014 kg/m3
(D) 1020 kg/m3
59. The colour of an opaque object is due to the colour it-
(A) Absorbs
(B) Refracts
(D) Scatters
(C) Reflects
60. Phenylketonuria is an example of an inform error of metabolism. This error refers to-
(A) Hormonal overproduction
(B) Atrophy of endocrine glands
(C) Inherited lack of an enzyme
(D) Non-disjunction
61. What is the name of the next generation super computer developed by the Centre for Development of Advanced Computing (C-DAC) ?
(A) Param Anant
(B) Param Arjun
(C) Param Aditya
(D) Param Vijay
62. In radar system, generation of power at high frequency needs-
(A) High power transformer
(B) High power antenna
(C) High power magnetron
(D) None of these
63. If a man weights 600 N on the earth, then his weight on the moon will be approximately-
(A) 6000 N
(B) 60 N
(C) 1000 N
(D) 100 N
64. At hills, water boils at a temperature of-
(A) Below 100°C
(B) Above 100°C
(C) 100°C
(D) None of these
65. Pressure of a gas is 75 cm of Hg at 27°C. The temperature at which the pressure will be doubled, volume being kept constant, is-
(A) 227°C
(B) 427°C
(C) 127°C
(D) 327°C
66. In which of the following processes the work done is zero ?
(A) Isothermal process
(B) Isochoric process
(C) Adiabatic process
(D) None of these
67. Boyle's law is applicable at –
(A) Constant pressure
(B) Constant temperature and pressure
(C) Constant temperature
(D) Constant pressure but variable tempera ture
68. For ice, specific latent heat of fusion is
(A) 80 cal /gm
(B) 0-80 cal/gm
(C) 800 cal/gm
(D) None of these
69. Choose the correct statement from the follow ing for a pinhole camera
(A) Light does not travel in a straight line
(B) Light travels in a straight line
(C) Forms upright, diminished image
(D) Shows the formation of shadows
70. Infra-red radiations
(A) Obey the law of refraction but not re flection
(B) Obey the law of reflection and refraction
(C) Do not obey the laws of reflection and refraction
(D) None of these
71. The inner back surface of the eye is called
(A) Pupil
(B) Retina
(C) Choroid
(D) Cornea
72. Ultrasonic sound has the frequency of-
(A) Above 20,000 vibrations per sec
(B) Below 20,000 vibrations per sec
(C) Below 20 vibrations per sec
(D) None of these
73. Armature of Dynamo is made with
(A) Ferromagnetic material
(B) Iron material
(C) Cu-material
(D) Porcelain material
74. In radar system, the transmitting antenna is of-
(A) Fixed type
(B) Rotating type in azimuth
(C) Rotating type in vertical plane
(D) Rotating type in azimuth or vertical plane or both
75. Medium wave broadcast is used for-
(A) Regional service
(B) National service
(C) International service
(D) Overseas communication service
76. Cosmic noise is caused by
(A) Lightning discharges
(B) Solar eruptions
(C) Distant stars
(D) Industrial discharges
77. Hartley oscillators is commonly used in-
(A) Radio current
(B) D.C. generator
(C) Camera
(D) Transformer
78. In a TV transmitter, the illuminated scene is televised with three TV cameras, each provided with an optical filter to transmit a particular colour. The colours used are-
(A) Red, green and yellow
(B) Red, green and blue
(C) Green, blue and yellow
(D) Green, red and violet
79. Inside a hollow matallic charged sphere
(A) The electric potential is zero
(B) The electric field is zero
(C) Both (A) and (B) are true
(D) Neither (A) nor (B) is true
80. The meter which is commonly used for servicing TV is known as
(A) Meggar
(B) Multimeter
(C) Frequency meter
(D) None of these
81. Which of the following is true regarding velo cities of electromagnetic waves and light waves ?
(A) They are equal
(B) The former is greater than the latter
(C) The latter is greater than the former
(D) None of these
82. For what load current is a zener voltage regu lator used ?
(A) Small
(B) Large
(C) Moderate
(D) None of these
83. There are three kinds of losses in transmission lines and these are
(A) Copper loss, dielectric loss and radiation loss
(B) Copper loss, heat loss and radiation loss
(C) Capacitance loss, inductance loss and heat loss
(D) None of these
84. Type of signalling used in an electronic exchange is
(A) Pulse signaling
(B) Tone signaling
(C) Both (A) and (B)
(D) None of these
85. Digital exchange is preferred over electro mechanical exchange due to which of the following reasons ?
(A) Transmission and reception noise are much less in digital exchange
(B) It can handle considerable amount of traffic
(C) It can be housed in a smaller space
(D) All of these
86. Diamond is an allotropic form of-
(A) Silicon
(B) Carbon
(C) Sulphur
(D) Germanium
87. Air is a/an
(A) Compound
(B) Element
(C) Mixture
(D) Electrolyte
88. In which of the following activities silicon carbide is used ?
(A) Making cement and glass
(B) Disinfecting water of ponds
(C) Making casts for statues
(D) Cutting very hard substances
89. The element common to all acids is
(A) Carbon
(B) Hydrogen
(C) Oxygen
(D) Sulphur
90. Tetraethyl lead is used as
(A) Mosquito repellent
(B) Pain killer
(C) Fire extinguisher
(D) Petrol additive
91. Which of the following is a nonmetal that remains liquid at room temperature ?
(A) Bromine
(B) Chlorine
(C) Helium
(D) Phosphorous
92. From which minerals is radium obtained ?
(A) Limestone
(B) Haematite
(C) Pitchblende
(D) Rutile
93. Which of the following is an element ?
(A) Ruby
(B) Sapphire
(C) Emerald
(D) Diamond
94. Sodium metal is kept under
(A) Water
(B) Alcohol
(C) Petrol
(D) Kerosene
95. Bromine is-
(A) A colourless gas insoluble is water
(B) A highly inflammable gas
(C) A black solid
(D) A red liquid
96. Permanent hardness of water can be removed by adding-
(A) Potassium permanganate
(B) Chlorine
(C) Bleaching powder
(D) Washing soda
97. Which of the following substances is a bad conductor of electricity but a good conductor of heat ?
(A) Asbestos
(B) Celluloid
(C) Purspecks
(D) Mica
98. Which of the following pairs does not contain a coinage metal ?
(A) Copper and gold
(B) Silver and gold
(C) Zinc and gold
(D) Copper and silver
99. The filament of an electric bulb is made of-
(A) Iron
(B) Nichrome
(C) Tungsten
(D) Graphite
100. The two elements that are frequently used for making transistors are-
(A) Boron and aluminium
(B) Silicon and germanium
(C) Iridium and tungsten
(D) Niobium and columbium
101. Which of the following gases is not known as greenhouse gas ?
(A) Carbon dioxide
(B) Methane
(C) Nitrous oxide
(D) Chlorofluorocarbons
102. The maximum temperature the human skin can tolerate without getting blisters is
(A) 40 ° C
(B) 60 ° C
(C) 80 ° C
(D) 100 ° C
103. Consider the following statements regarding graphite
1. It is an allotrope of carbon
2. It is a good conductor of heat and elect ricity
3. It can be artificially produced Of these statements ,
(A) 1, 2 and 3 are correct
(B) 1 and 2 are correct
(C) 1 and 3 are correct
(D) 2 and 3 are correct
104. Chemical formula for water glass is-
(A) Na2SiO3
(B) Al2O3
(C) NaAlO2
(D) CaSiO3
105. Heavy water is
(A) Tritium oxide
(B) Deuterium oxide
(C) Rain -water
(D) Water at - 4°C
106. The gases used in different types of welding would include
(A) Oxygen and hydrogen
(B) Oxygen, acetylene and argon
(C) Oxygen and acetylene
(D) Oxygen, hydrogen, acetylene and nitro gen
107. Potassium nitrate is used in
(A) Salt
(B) Glass
(C) Fertiliser
(D) Medicine
108. In which type of rocks are metals like gold and copper mostly found ?
(A) Old igneous
(B) Old sedimentary
(C) Old metamorphic
(D) New metamorphic
109. Which of the following metals remains in liquid form under normal conditions ?
(A) Uranium
(B) Radium
(C) Zinc
(D) Mercury
110. Marsh gas is-
(A) Hydrogen
(B) Nitrogen
(C) Methane
(D) Ethane
111. Carbon, diamond and graphite are together called
(A) Isomers
(B) Allotropes
(C) Isomorphs
(D) Isotopes
112. Galvanised iron sheets have a coating of-
(A) Tin
(B) Lead
(C) Zinc
(D) Chromium
113. Among the various allotropes of carbon
(A) Diamond is the hardest, lamp black is the softest
(B) Diamond is the hardest, coke is the softest
(C) Coke is the hardest, graphite is the softest
(D) Diamond is the hardest, graphite is the softest
114. Liquefied Petroleum gas consists of mainly-
(A) Methane, ethane and hexane
(B) Ethane, hexane and nonane
(C) Methane, butane and propane
(D) Methane, hexane and nonane
115. Which of the following is not an isotope of hydrogen ?
(A) Protium
(B) Yttrium
(C) Deuterium
(D) Tritium
116. Of the metals, which one pollutes the air of a big city ?
(A) Copper
(B) Chromium
(C) Lead
(D) Cadmium
117. How many teeth are known as milk teeth in human beings ?
(A) 4
(B) 12
(C) 20
(D) 28
118. Water is a compound because-
(A) It exists as a solid, a liquid or a gas
(B) It contains hydrogen and oxygen
(C) It contains two different elements joined by chemical bonds
(D) It cannot be split up into simpler substances by chemical means
119. Potassium permanganate is used for purify ing drinking water, because-
(A) It dissolves the impurities of water
(B) It is a sterilising agent
(C) It is an oxidising agent
(D) It is a reducing agent
120. When an iron nail gets rusted, iron oxide is formed ?
(A) Without any change in the weight of the nail
(B) With increase in the weight of the nail
(C) With decrease in the weight of the nail
(D) Without any change in colour or weight of the nail
121. If father and mother are possessing Rh + ve and Rh- ve respectively , their children will have the blood group with
(A) RH + ve
(B) Rh - ve
(C) Rh neutral
(D) None of these
122. The hardest substance available on earth is-
(A) Platinum
(B) Coal
(C) Diamond
(D) Gold
123. Actinides are the elements with atomic numbers from
(A) 36 to 43
(B) 89 to 103
(C) 97 to 114
(D) 101 to 115
124. About .............. of the total calcium present in the human body is in the blood.
(A) 99 %
(B) 70 %
(C) 5 %
(D) 1 %
125. The average salinity of sea water is-
(A) 20 %
(B) 25 %
(C) 30 %
(D) 35 %
126. The chemical (ethylmerceptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of-
(A) Sulphur
(B) Fluorine
(C) Chlorine
(D) Bromine
127. The inert gas which is substituted for nitrogen in the air, used by deep sea divers for breathing, is-
(A) Helium
(B) Argon
(C) Krypton
(D) Xenon
128. The group of metals Fe, Co, Ni may be best called as
(A) Alkaline metals
(B) Rare metals
(C) Main group metals
(D) Transition metals
129. Amalgams are-
(A) Alloys which contain carbon
(B) Alloys which have great resistance to abrasion
(C) Alloys which contain mercury as one of the contents
(D) Highly coloured alloys
130. The gland, which in relation to body size is largest at birth and then gradually shrinks after puberty is-
(A) Thyroid
(B) Pituitary
(C) Thymus
(D) Adrenal
131. The property of a substance to absorb mois ture from the air on exposure is called-
(A) Osmosis
(B) Dessication
(C) Efflorescence
(D) Deliquescence
132. Brass gets discoloured in air because of the presence of which of the following gases in air ?
(A) Carbon dioxide
(B) Oxygen
(C) Hydrogen sulphide
(D) Nitrogen
133. Quartz crystals normally used in quartz clocks etc. is chemically
(A) Sodium silicate
(B) Germanium oxide
(C) Silicon dioxide
(D) A mixture of B and C
134. Bell metal is an alloy of-
(A) Brass and nickel
(B) Zinc and copper
(C) Tin and copper
(D) Nickel and copper
135. Which of the following are the ingredients of gun metal ?
(A) Iron, Tin
(B) Copper, Tin
(C) Iron, Brass, Tin
(D) Iron, Zinc, Titanium
136. The variety of coal in which the deposit contains recognisable traces of the original plant meterial is-
(A) Anthracite
(B) Lignite
(C) Peat
(D) Bitumen
137. In fireworks, the green flame is produced because of-
(A) Mercury
(B) Sodium
(C) Potassium
(D) Barium
138. Which of the following was to be discovered first in the chromosphere of the Sun ?
(A) Xenon
(B) Helium
(C) Neon
(D) Krypton
139. Which among the following is a positively charged particles emitted by a radioactive element ?
(A) Alpha ray
(B) Beta ray
(C) Gamma ray
(D) Cathode ray
140. Nuclear fission is caused by the impact of-
(A) Proton
(B) Electron
(C) Neutron
(D) None of these
141. The largest cell in the human body is
(A) Nerve cell
(B) Muscle cell
(C) Liver cell
(D) Kidney cell
142. How many colours the sunlight spectrum has ?
(A) Five
(B) Three
(C) Seven
(D) Four
143. In atomic explosion, enormous energy is released which is due to the-
(A) Conversion of neutrons into protons
(B) Conversion of chemical energy into heat energy
(C) Conversion of mechanical energy into nuclear energy
(D) Conversion of mass into energy
144. The age of most ancient geological formation is estimated by
(A) Potassium-Argon method
(B) Ra-Si method
(C) C14method
(D) Uranium-Lead method
145. What are soaps ?
(A) Salts of silicates
(B) Esters of heavy fatty acids
(C) Sodium or potassium salts of heavier fatty acids
(D) Mixture of glycerol and alcohols
146. Rayon is chemically
(A) Glucose
(B) Amylose
(C) Cellulose
(D) Pectin
147. Which type of fire extinguisher is used for petroleum fire ?
(A) Foam type
(B) Soda acid type
(C) Powder type
(D) None of these
148. The type of glass used in making lenses and prism is
(A) Soft glass
(B) Pyrex glass
(C) Jena glass
(D) Flint glass
149. What is condensation ?
(A) Change of gas into solid
(B) Change of solid into liquid
(C) Change of vapour into liquid
(D) Change of heat energy into cooling energy
150. A substance which changes readily into var-our without heating is called
(A) Efflorescent
(B) Synthetic
(C) Volatile
(D) Effervescent
151. In which of the following processes light energy is converted into chemical energy ?
(A) Respiration
(B) Fermentation
(C) Photosynthesis
(D) Photorespiration
152. Insect form the largest class of animals living on land and sea. They are grouped into
(A) 22 orders
(B) 26 orders
(C) 29 orders
(D) 32 orders
153. Which of the following has the smallest egg ?
(A) Ostrich
(B) Humming bird
(C) Pigeon
(D) Homo sapiens
154. ‘Bar’ is the unit of-
(A) Heat
(B) Temperature
(C) Current
(D) Atmospheric pressure
155. What is the unit for measuring the pitch or frequency of sound ?
(A) Coulomb
(B) Hum
(C) Decibel
(D) Hertz
156. Kilohertz is a unit which measures
(A) Electric resistance
(B) Power used by a current of one ampere
(C) Electromagnetic radio wave frequencies
(D) None of these
157. An ant can see the object all around it due to the presence of-
(A) Simple eyes
(B) Eyes over the head
(C) Well developed eyes
(D) Compound eyes
158. An ordinary tubelight used for lighting purpose contains –
(A) Fluorescent material and an inert gas
(B) One filament, reflective and mercury vapour
(C) Fluorescent material and mercury vapour
(D) Two filaments, fluorescent material and mercury vapour
159. The term 'Black Box' is more commonly used in relation to which of the following ?
(A) It is a box in which high grade uranium is kept to prevent radiation
(B) It is a time capsule in which records of important events are kept to be opened at a later date
(C) It is a flight recorder in an aeroplane
(D) None of these
160. The lightning conductors used in building protects the building by
(A) Dissipating the electric charge away from the building
(B) Conducting the lightning safely to the ground
(C) Absorbing the electric charge
(D) None of these
161. Hormones are normally absent in
(A) Rat
(B) Monkey
(C) Bacteria
(D) Cat
162. The hydraulic brakes used in automobiles is a direct application of-
(A) Archimedes Principle
(B) Toricellian law
(C) Bernoulli's theorem
(D) Pascal’s law
163. Which of the following statements is correct ?
(A) Dynamo converts electrical energy into heat energy and electric motor converts mechanical energy into electrical energy
(B) Dynamo converts mechanical energy into electrical energy and electric motor converts electrical energy into mechani cal energy
(C) Both dynamo and electric motor convert electrical energy into mechanical energy
(D) Both dynamo and electric motor convert mechanical energy into electrical energy
164. The tape of a taperecorder is coated with
(A) Zinc oxide
(B) Copper sulphate
(C) Mica
(D) Ferromagnetic powder
165. When a coil is rotated in magnetic field , induced current is generated in the coil. This principle is used in making
(A) Electromagnet
(B) Electric motor
(C) Electric generator
(D) Electric watt meter
166. In an ordinary dry cell, the electrolyte is-
(A) Sulphuric acid
(B) Manganese dioxide
(C) Ammonium chloride
(D) Zinc
167. The mixed oxide fuel is used for which of the following ?
(A) Nuclear Reactors
(B) Aeroplanes
(C) Cryogenic Engines
(D) PSLV rockets
168. Which of the following takes place when the subject speaks untruth while being tested by the polygraph instrument ?
1 . His blood pressure goes up
2. His pulse quickens
3. His skin darkens
4. He sneezes
(A) 1 and 2
(B) 3 and 4
(C) 1 , 2 and 3
(D) 2,3 and 4
169. What is the function of a microprocessors in a computer ?
(A) It allows the keyboard to write on the computer
(B) It allows the outputs to be taken from a computer
(C) It performs all the functions of a CPU (Central Processing Unit)
(D) None of these
170. ' Teletext ' means
(A) The process of converting black and white TV sets into coloured ones
(B) Flashing the text of the message on the telex machine
(C) Flashing of telephone conversation on TV screen
(D) Flashing of the text of news and information on the TV screen
171. Which of the following statements about a refrigerator is/are correct ?
1. It converts electrical energy into heat energy.
2. It converts electrical energy into mecha
3. It transfer heat from a high temperature to a low temperature
4. It transfers heat from a low temperature to a high temperature
(A) 1 and 3
(B) 2 and 3
(C) 1 and 4
(D) 4 only
172. Which of the following is the fastest storing input/output device in a computer ?
(A) Magnetic floppy disc
(B) Tetetype writer
(C) Visual Display unit
(D) None of these
173. Where is Satish Dhawan Space Centre situa ted ?
(A) Thumba
(B) Sriharikota
(C) Ahmedabad
(D) None of the above
174. Which of the following pairs is/are correctly matched ?
Gland Hormones
1. Pituitary - Follicle stimulating hormone
2. Thyroid - Somatotropic hormone
3 . Parathyroid - Thyroxine
(A) I only
(B) 1 and 2
(C) 3 only
(D) 1 , 2 and 3
175. In mammals, the part of the brain that has reached highest level of development and that has enabled humans to grow their own crop, invent machines, develop language and art is
(A) Cerebrum
(B) Cerebellum
(C) Medulla Oblongata
(D) None of these
176. A person will have brown eyes, blue eyes or black eyes depending upon the particular pigment present in the
(A) Pupil
(B) Cornea
(C) Iris
(D) Choroid
177. What is the maximum limit of sound intensity in decibel units beyond which a person cannot hear ?
(A) 50
(B) 70
(C) 85
(D) 95
178. Biological death of a patient means death of tissues of the
(A) Kidney
(B) Heart
(C) Lungs
(D) Brain
179. During the development of an embryo, the formation of brain marks the beginning of organ formation. Eye in a vertebrate develops from midbrain. If after the formation of brain, the midbrain is destroyed, then what will be the resultant effect ?
(A) Total failure of eye formation
(B) Development of a single eye
(C) Defective development of eyes
(D) Absence of vision in the eyes
180. Clotting of blood vessels is called
(A) Thrombosis
(B) Rheumatism
(C) Agglutinisation
(D) Fibrosis
181. Blood group of an individual is controlled
(A) Shape of RBC
(B) Shape of WBC
(C) Genes
(D) Haemoglobin by is to
182. If one chews an unsweetened chapati for a short time, distinctly sweetish taste becomes noticeable because
(A) Carbohydrate is converted into sugar in the mouth
(B) Protein is converted into sugar in the mouth
(C) Fat is converted into sugar in the mouth
(D) Vitamins are converted into sugar in the mouth
183. Red-green colour blindness in man is known as
(A) Protanopia
(B) Deuteranopia
(C) Both A and B
(D) Marfan's syndrome
184. For transfusion, the ' O ' blood group of a donor can be accepted by a person having blood group
(B) B
(A) A
(C) AB
(D) All of these
185. The most important function of perspiration
(A) Lubricate the skin
(B) Get rid of the body wastes
(C) Regulate body temperature
(D) Regulate body wastes
1. (C) 2. (B) 3. (D) 4. (B) 5. (B) 6. (C) 7. (B) 8. (A) 9. (D) 10. (D) 11. (C) 12. (B) 13. (D) 14. (A) 15. (B)16. (C) 17. (C) 18. (A) 19. (C) 20. (D)21. (C) 22. (B) 23. (B) 24. (C) 25. (C) 26. (C) 27. (A) 28. (D) 29. (C) 30. (B) 31. (C) 32. (A) 33. (C) 34. (A) 35. (B) 36. (B) 37. (C) 38. (A) 39. (A) 40. (B) 41. (A) 42. (C) 43. (B) 44. (C) 45. (C) 46. (A) 47. (A) 48. (D) 49. (D) 50. (D) 51. (B) 52. (C) 53. (D) 54. (B) 55. (C) 56. (A) 57. (B) 58. (D) 59. (C) 60. (C) 61. (A) 62. (C) 63. (D) 64. (A) 65. (D) 66. (B) 67. (C) 68. (A) 69. (B) 70. (B) 71. (B) 72. (A) 73. (B) 74. (B) 75. (A) 76. (C) 77. (A) 78. (B) 79. (B) 80. (B) 81. (A) 82. (B) 83. (C) 84. (C) 85. (D) 86. (B) 87. (C) 88. (D) 89. (B) 90. (D) 91. (A) 92. (C) 93. (D) 94. (D) 95. (D) 96. (D) 97. (D) 98. (C) 99. (C) 100. (B) 101. (C) 102. (A) 103. (A) 104. (A) 105. (B) 106. (C) 107. (D) 108. (A) 109. (D) 110. (C) 111. (B) 112. (C) 113. (D) 114. (C) 115. (B) 116. (C) 117. (C) 118. (C) 119. (C) 120. (B) 121. (A) 122. (C) 123. (B) 124. (D) 125. (D) 126. (A) 127. (A) 128. (D) 129. (C) 130. (C) 131. (D) 132. (C) 133. (C) 134. (C) 135. (B) 136. (C) 137. (D) 138. (B) 139. (A) 140. (C) 141. (A) 142. (C) 143. (D) 144. (C) 145. (C) 146. (C) 147. (C) 148. (D) 149. (C) 150. (C) 151. (C) 152. (B) 153. (D) 154. (D) 155. (C) 156. (C) 157. (D) 158. (D) 159. (C) 160. (B) 161. (C) 162. (D) 163. (B) 164. (D) 165. (C) 166. (C) 167. (C) 168. (A) 169. (C) 170. (D) 171. (C) 172. (A) 173. (B) 174. (A) 175. (A) 176. (C) 177. (C) 178. (D) 179. (C) 180. (A) 181. (C) 182. (A) 183. (A) 184. (D) 185. (B)
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