Miscellaneous MCQ on Science for Competitive exams
Test Series no. 4
1.What is the SI unit for measuring intensity of sound or noise?
(A) DB (Decibel)
(B) Joule
(C) Hertz
(D) Ampere
2.………..is a vector quantity.
(A) Displacement
(B) Velocity
(C) Both A and B
(D) None of the above
3. A flying aeroplane in the sky has …………..type of energy.
(A) Both potential and kinetic energy
(B) Both kinetic and electrical energy
(C) Both mechanical and gravitational energy
(D) Both chemical and kinetic energy
4. Gravitational force is maximum at ……………….places.
(A) At poles
(B) At equator
(C) At latitudes
(D) At longitudes
5. What law/principle explains the working of the hydraulic brakes in automobiles?
(A) Pascal’s Law
(B) Newton’s Law
(C) Archimedes’ Law
(D) None of the above
6. Ozone layer above the surface of the earth provides a shield against?
(A) Manta rays
(B) Infra-Red rays
(C) Ultra violet rays
(D) Alpha rays
7. The colour of stars in the universe depends on its/their ………….
(A) Size
(B) Surface temperature
(C) Birth time
(D) Pressure
8. What type of mirrors has been used in automobiles to see the traffic on the rear side is……….
(A) Concave
(B) Convex
(C) Cylindrical
(D) Zero number
9. The frequency of direct current is
(A) 100 Hz
(B) 70 Hz
(C) 50 Hz
(D) 0 Hz
10. Mesons are found in what type of rays?
(A) Mantra rays
(B) Cosmic rays
(C) Electric rays
(D) Gamma rays
11. Cathode rays are
(A) Streams of electrons observed in vacuum tubes
(B) Streams of neutrons observed in vacuum tubes
(C) streams of positive rays
(D) Streams of electromagnetic waves
12. The mercury and sodium vapor street lamps light up because of
(A) Neutron emission
(B) Electron emission
(C) Atomic emission
(D) None of the above
13. The four-stroke petrol engine is based on which cycle?
(A) Motto cycle
(B) Otto cycle
(C) Brayton cycle
(D) Diesel cycle
14. A mixture of water and alcohol (ethanol) can be separated by which process?
(A) Fractional distillation
(B) Simple distillation
(C) Steam distillation
(D) Vacuum distillation
15. Atomic theory of matter was given by…………
(A) Otto Hahn
(B) John Dalton
(C) Albert Einstein
(D) Antoine Lavoisier
16. The radioactive elements which is commonly used in nuclear for producing electricity by nuclear fission is
(A) Uranium
(B) Protons
(C) Electrons
(D) Protons
17. First recognisable Periodic Table was published by
(A) Dmitri Mendeleev in 1869
(B) Edward Jenner in 1879
(C) C N Barnard
(D) Louis Pasteur
18. What is the chemical symbol of Silver?
(A) Au
(B) As
(C) Ag
(D) Fe
19. The number of hydrogen bonds between guanine and cytosine in DNA is
(A) 1 hydrogen bonds
(B) 3 hydrogen bonds
(C) 4 hydrogen bonds
(D) 2 hydrogen bonds
20. Which metal forms an amalgam with other metals?
(A) Mercury
(B) Titanium
(C) Platinum
(D) Zirconia
21. Which amalgam are important in dentistry?
(A) Zirconia
(B) Titanium
(C) Silver
(D) Gold
22. Air expand when it is
(A) In solid form
(B) Cooled
(C) Heated
(D) In room temperature
23. Which of the following is used in modern day pencils?
(A) Lead
(B) Graphite
(C) Carbon-14
(D) All of the above
24. ……..is the hardest allotrope of carbon.
(A) Diamond
(B) Coal
(C) Carbyne
(D) Fullerene
25. The major constituent of Biogas is …………
(A) Ammonia
(B) H2S
(C) CO2
(D) Methane
26. ……………..is and alloy of copper (Cu) and zinc (Zn).
(A) Silicon
(B) Silver
(C) Brass
(D) Titanium
27. The highest volume of gases in lower atmosphere is comprised of
(A) Oxygen
(B) Nitrogen
(C) Both A and B
(D) None of the above
28. Milk of magnesia is an/a
(A) Magnesium hydroxide
(B) Magnesium citrate
(C) Magnesium oxide
(D) None of the above
29. On 3rd December 1984, …………………. gas was leaked from pesticide plant in Bhopal, India.
(A) Difluoro Dichloro Methane
(B) Methyl isocyanate gas
(C) Sodium Thiosulphate
(D) None of the above
30. The chemical substance present in bones and teeth is
(A) Calcium phosphate
(B) Calcium carbonate
(C) Calcium sulphate
(D) Calcium carbide
31. Which is the tallest living flightless bird?
(A) Ostrich
(B) Kangaroo
(C) Hummingbird
(D) Woodpecker
32. In humans each cell contains …………….number of pairs of chromosomes.
(A) 86
(B) 46
(C) 23
(D) 0
33. Who is the father of DNA fingerprinting?
(A) Sir Crick
(B) Sir Alec Jeffreys
(C) James Watson
(D) H. M Smith
34. Who is the Father of RNA?
(A) James Watson
(B) Leslie Orgel
(C) Sir Alec Jeffreys
(D) None of the above
35. Which mosquito is the carrier of Zika virus?
(A) Anopheles
(B) Culex
(C) Aedes aegypti
(D) Homologues
36……………….a protein which exists naturally in human skin, fingernails and hair.
(A) Non collagen
(B) Keratin
(C) Collagen
(D) Globular
37. Which of the following is/are fat soluble vitamins?
(A) Vitamin A
(B) Vitamin D
(C) Vitamin E
(D) Vitamin K
(E) All of the above
38. Vitamin C and Vitamin B complex are ………………vitamins.
(A) Water soluble
(B) Fat soluble
(C) Both A and B
(D) None of the above
39. Which of the following diseases are caused by virus?
(A) Chicken pox, influenza, hepatitis
(B) Dengue, Polio, Rabies
(C) Rinderpest, Swine flu, common cold
(D) All of the above
40. …………….is responsible for oxygen transportation in humans.
(A) Red blood cells
(B) Plasma
(C) Haemoglobin
(D) Platelets
41. Which is the universal recipient/ acceptor blood group?
(A) AB+
(B) O-
(C) Both (A) and (B)
(D) Neither (A) nor(B)
42. ………….is generally called as milk sugar as it is found in milk.
(A) Fructose
(B) Lactose
(C) Sucrose
(D) Maltose
43. What is the full form of AMR?
(A) Antimicrobial Resistance
(B) Antidote microbial resistance
(C) Any microbial resistance
(D) None of the above
44. ……..is measured in the unit called Gauss.
(A) Magnetic
(B) Magnet induction
(C) Magnetic induction
(D) None of the above
45.…………..pigment in onions cause purple/red colour and highly concentrated in the skin.
(A) Anthocyanins
(B) Chlorophyll
(C) Lycopene
(D) Melanin
46. Leprosy is caused by a bacterium called …………
(A) Q fever
(B) Mycobacterium leprae
(C) Whooping cough
(D) Strep throat
47. Who discovered the cells first?
(A) Robert Hooke in 1665
(B) George Emil Palade in 1665
(C) Robert Brown in 1665
(D) None of the above
48. Enzyme linked immune sorbent assay (ELISA) is a technique to detect which disease?
(A) Amyotrophic lateral sclerosis (ALS)
(B) Acquired immunodeficiency syndrome (AIDS)
(C) Alcoholic liver disease (ALD)
(D) None of the above
49. ………..chemical is responsible for yellow colour in urine.
(A) Blood
(B) Pus discharge
(C) Urobilin
(D) Kidney failure
50. Which is the application of plant and soil science to crop production?
(A) Agronomy
(B) Crop insurance
(C) Agri app
(D) Pesticides
51. …………..is the major disaccharide found in milk and is catabolized into glucose and galactose by the enzymes lactase.
(A) Fructose
(B) Lactose
(C) Glucose
(D) Sucrose
52. …….. scientific instrument is used to measure the height of an aircraft above a fixed level.
(A) A stadimeter
(B) A hypsometer
(C) An altimeter
(D) None of the above
53.How many bones are there in human hand?
(A) 206
(B) 26
(C) 27
(D) 207
54. ………….is a sleep disorder and another name for sleepwalking.
(A) Obsessive
(B) Parasomnia
(C) Bipolar
(D) Schizophrenia
55. Which is responsible for green light in fireworks?
(A) Barium
(B) Carbon
(C) Lithium
(D) Potassium
56. Cytology is related to the study of which?
(A) Tissues
(B) Blood
(C) Cells
(D) Nails
57. Tiny pores present on the surface of leaves are known as …………
(A) Cromata
(B) Zygote
(C) Stomata
(D) None of the above
58. Trace mineral found in our body is ……………
(A) Calcium
(B) Sulphur
(C) Selenium
(D) Magnesium
59. Anagen, catagen, telogen and exogen are growth stages of which part of human body?
(A) Hair
(B) Nails
(C) Cells
(D) All of the above
60. …………….. chemical reaction takes place during the cooking of meat.
(A) Fermentation
(B) Maillard reaction
(C) Caramelization
(D) Emulsification
61. Which one of these pair is exclusively of vestigial organs of human?
(A) Coccyx and pinna muscles
(B) Coccyx and facial hair in women
(C) Coccyx and intercostal muscles
(D) Coccyx and molar teeth
62. The correct sequence of number of carbon atoms present in (a) compressed natural gas, (b) diesel and (c) petrol is
(A) a > c > b
(B) b > a > c
(C) c > a > b
(D) None of the above
63. Match List-I with List-II and select the correct answer by using the codes given below the list :
| List-I (Monomer) List-II (Polymer) |
| (a) Chloroethene (i) P.A.N. |
| (b) Caprolactum (ii) Natural rubber |
| (c) Isoprene (iii) Nylon-6 |
| (d) Acrelonitrile (iv) P.V.C. |
(A) (a)- (i), (b)- (ii), (c)- (iii), (d)- (iv)
(B) (a)- (iv), (b)- (iii), (c)- (ii), (d)- (i)
(C) (a)- (i), (b)- (iii), (c)- (ii), (d)- (iv)
(D) (a)- (iii), (b)- (iv), (c)- (ii), (d)- (i)
64. Which of the following strategies are useful for preventing oxidation of food stuffs?
| (i) Addition of antioxidants |
| (ii) Keeping food in airtight container |
| (iii) Use of flush bags containing inert gases |
| (iv) Addition of buffer solutions |
(A) (ii) and (iv)
(B) (i) and (iii)
(C) (ii) and (iv)
(D) All of the above
65. Two heaters are marked 200V, 300W and 200V, 600W. If the heaters are connected in series and the combination connected to a 200V dc supply, then which option is true out of the following?
(A) Both the heater will produce same heat
(B) heat produced in 600W heater is more
(C) heat produced in 300W heater is more
(D) heat produced in 1000W heater is more
66. The “essential whorls” of a flower are:
| (i) Calyx |
| (ii) Corolla |
| (iii) Androecium |
| (iv) Gynoecium |
(A) (iii) and (iv)
(B) (i) and (ii)
(C) (i) and (iv)
(D) None of the above
67. Match List-I with List-II and select the correct answer by using the codes given below the list :
| List-I (Alloy) List-II (Constituent) |
| (a) Brass (i) Cu and Sn |
| (b) Bronze (ii) Al, Cu, Mg and Mn |
| (c) Duralumin (iii) Al and Mg |
| (d) Magnellium (iv) Cu and Zn |
(A) (i) (iii) (ii) (iv)
(B) (iii) (ii) (i) (iv)
(C) (iv) (i) (ii) (iii)
(D) (i) (iv) (ii) (iii)
68. The refractive index of the material of the film is 1.25. The minimum thickness of a film which will strongly reflect the light of wavelength 589 nm will be :
(A) 88.5nm
(B) 118nm
(C) 177.5nm
(D) 238nm
69. The compound in which cation is isoelectronic with anion is :
(A) Sodium Chloride
(B) Sodium iodide
(C) Potassium Sulphide
(D) Cerebrospinal Fluid
70. In Frog heart, there are cardiac muscles which consist of fibres called :
(A) Purkinje fibres
(B) Myonemes
(C) Telodendria
(D) Columnae carnae
71. In malaria, the product released by mosquito into blood that cause chill and fever, is called :
(A) Schuffner’s dot
(B) Rhizotoxin
(C) Hematin
(D) Haemozoin
72. Deforestation does not result in
(A) Decrease in rainfall
(B) Increase in soil erosion
(C) Increase in ground water level
(D) Increase in earth’s atmosphere
73. Spermatids are transformed into spermatozoa by the process of
(A) Spermiogenesis
(B) Spermitation
(C) Spermatosis
(D) Spermotis
74. When an inductor L and a resistor R in series are connected across a 12V, 50Hz supply, a current of 0.5 A flows in the circuit. The current differs in phase from applied voltage by π/3 radian. The value of R will be :
(A) 4 Ω
(B) 6 Ω
(C) 8 Ω
(D) 12 Ω
75. The microtubules from opposite poles of the spindle get attached to the kinetochores of sister chromatids during:
(A) Prophase-II
(B) Prophase-I
(C) Metaphase-II
(D) Anaphase-II
76. Which of following is not an adaptation for Xerophytes?
(A) Presence of chlorenchymatous tissue in stem cortex
(B) Presence of sclerenchymatous tissue in stem hypodermis
(C) Presence of waxy layer on aerial plant parts
(D) Presence of aerenchymatous cells in stem
77. Which of the following cannot be charged easily by friction?
(A) A woollen cloth
(B) An inflated balloon
(C) A plastic scale
(D) A copper rod
78. How many effective codons are there for the synthesis of twenty amino acids?
(A) 64
(B) 32
(C) 41
(D) 61
79. A thin glass prism of refractive index 1.5 produces a deviation of 4° of a ray incident at a small angle. What will be the deviation of the same incident ray by the same prism if it immersed in water of refractive index 4/3 ?
(A) 1o
(B) 2o
(C) 18o
(D) 14o
80. The time period between a full moon to the next full moon is :
(A) 28 days
(B) slightly longer than 28 days
(C) 29 days
(D) Slightly longer than 29 days
81. Which of the following does not contribute towards the formation of photochemical smog?
(A) NO
(B) SO2
(C) O3
(D) Volatile Organic Compound
82. The seeds of which of the following plants are not dispersed by wind?
(A) Calotropis
(B) Cotton
(C) Coconut
(D) Drumstick (Moringa)
83. Which of the following compound is responsible for tarnishing of silver?
(A) Ag2
(B) Ag2CO3
(C) Ag2S
(D) AgCN
84. Clothes obtained from cellulose are:
(A) Cotton and Rayon
(B) Rayon and Nylon
(C) Nylon and Silk
(D) Silk and Cotton
85. Which of the followings are the applications of common salt?
| (i) It is used as preservative. |
| (ii) It is used for manufacture of Na metal and 2 Cl (g) by electrolysis in molten state. |
| (iii) It is used for manufacture of caustic soda. |
| (iv) It is used for manufacturing baking soda and washing soda by Solvay process. |
(A) (i), (ii) and (iii)
(B) (i), (ii) and (iv)
(C) (ii), (iii) and (iv)
(D) All of the above
86. Which power plant works on the basis of gravity of earth?
(A) Geothermal
(B) Windfarms
(C)Hydropower
(D)Nuclear Power
87. Which of the following alkene will give the same product when treated with HBr in presence and absence of peroxide?
(A) Propene
(B) Butene-2
(C) 2- Methyl propene
(D) Butene-1
88. The antiseptic action of Dettol is due to:
(A) Chlorobenzene
(B) Chloroxylenol
(C) Chloroquine
(D) Chloroethylene
89. In which medium the speed of sound will be maximum?
(A) Water
(B) Steel
(C) Copper
(D) Aluminium
90. The actual weight of a person is mg. When the lift is moving uniformly in upward direction, the apparent weight of the person in lift will be:
(A) 0
(B) mg
(C) m(g+a)
(D) M(g-a)
91. Match List-I with List-II and select the correct answer by using the codes given below the list :
| List-I (Chemical Substance) List-II (Application) |
| (a) Bleaching Powder (i) Preparation of glass |
| (b) Baking Soda (ii) For making toys |
| (c) Washing Soda (iii) Decolourisation |
| (d) Plaster of Paris (iv) Antacid |
(A) (iii) (iv) (i) (ii)
(B) (ii) (iv) (i) (iii)
(C) (iii) (ii) (iv) (i)
(D) (ii) (iv) (i) (iii)
92. Which of the following are exothermic processes?
| (i) Reaction of water with quick lime |
| (ii) Melting of ice |
| (iii) Evaporation of water |
| (iv) Dilution of an acid |
(A) (i) and (iii)
(B) (i) and (ii)
(C) (i) and (iv)
(D) (iii) and (ii)
93. Fractional distillation method is used for purification of liquids when there is a
(A) Small difference (less than 25°C) in their boiling points
(B) No difference in their boiling points
(C) Large difference (greater than 25°C) in the boiling points of liquid
(D) Small difference in the melting points
94. The compound 1, 2-butadiene has:
(A) Only sp2 hybridized carbon atoms
(B) sp, sp2 and sp3 hybridized carbon atoms
(C) Only sp hybridized carbon atoms
(D) Both sp and sp2 hybridized carbon atoms
95. Which of the following pair gives 1° carbonium ion by heterolysis of C-Br bond?
(A) Isopropyl bromide, isobutyl bromide
(B) Isobutyl bromide, sec – butyl bromide
(C) Neo-pentyl bromide, iso-butyl bromide
(D) Active amyl bromide, iso-propyl bromide
96. Which of the following is not a carbohydrate?
(A) Stevia
(B) Starch
(C) Cellulose
(D) Lactose
97. Which of the following is/are social insects?
(A) Termites
(B) Ants
(C) Both (A) and (B)
(D) None of the above
98. Loss of water from the plant body takes place through:
(A) Stomata, cell wall of mesophyll cells and hydathodes
(B) Stomata and cell wall of mesophyll cells
(C) Stomata and hydathodes
(D) Cell wall of mesophyll cells and hydathodes
99. Phenetic classification is based on:
(A) Observable characteristics existing organisms of
(B) Deudograms based on DNA characteristics
(C) Sexual characteristics
(D) The ancestral lineage of existing organisms
100. Phenetic Classification also known as
(A) Taximetrics Taxonomy
(B) Numerical Taxonomy
(C) Both (A) and(B)
(D) None of the above
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