# Bihar STET Answer Key 2019 Paper-1 ~ 28 Jan 2020 Exam

Bihar BSEB STET Answer Key 2019-20: The official answer key and solved paper for Bihar STET exam for paper-1 is released on www.studyguide.org website. The BSEB STET exam has been conducted on 28th Jan 2020 at more than 3,000 exam centers in Bihar state.

Bihar School Education Board (BSEB) has conducted the Bihar Secondary Teacher Eligibility Test i.e. BSTET-2019. Candidates who have appeared in the exam are now searching for the Bihar TET Answer key 2019 for both Paper 1 & Paper 2.

## Bihar STET Answer Key – Paper 1 – 28 Jan 2020 Exam Question Paper

For becoming government teachers in Class 9 and 10 they must qualify TET 1 paper and TET 2 was for classes 11 and 12. There were 10 sets of STET question papers with codes set A, B, C, D, E, F, G, H, I and set J. For every right answer, 1 mark will be allotted and there is no negative marking for wrong answers.

Download –> BSTET 2019 Answer Key – Pedagogy Question paper BSTET 2019 Answer Key Paper-1 for 28 Jan 2020 exam

### BSTET Answer Key Paper-1 Science – 28 Jan 2020 – SET G – Ques 50-150

1. According to laws of reflection, the angle of incidence and the angle of reflection are
• equal
• unequal
• parallel
• none of these
2. Which of the following oxide is amphoteric?
• Fe2O3
• Al2O3
• P2O5
• N2O
3. Which of the following non-metals is a liquid?
• Carbon
• Sulphur
• Bromine
• Iodine
4. For the
• 23 cm
• 25 cm
• Infinity
• None of these
5. The focal length of a lens is 25 cm. Its power will be
• 4.0 D
• 0.4 D
• 2.5 D
• 5.2 D
6. Sound wave with frequencies below the audible range is known as
• Ultrasonic
• Infrasonic
• Intensity of sound
• None of these
7. Which of the following technique is used to determine the depth?
• RADAR
• SONAR
• MOTAR
• None of these
8. The radius of curvature of a concave mirror is 24cm. The focal length of the mirror is
• 42 cm
• 24 cm
• 21 cm
• 12 cm
9. The resistances of 3 ohm and 6 ohm are connected in parallel. What will be their equivalent resistance?
• 1 ohm
• 2 ohm
• 3 ohm
• 4 ohm
10. Which substance is formed by the carbonization of dead vegetation?
• Coal
• Coal gas
• Coke
• Coal tar
11. Zinc blend is obtained from which process from Zinc Oxide?
• Roasting
• Hydrogenation
• Chlorination
• Calcination
12. Which of the following is the most reactive halogen?
• F
• Cl
• Br
• I
13. The elements of group one (1) of the periodic table are known as
• Normal elements
• Transition elements
• Alkali metals
• Lanthanides
14. An unsaturated hydrocarbon in which the two carbon atoms are arranged triple bond is called?
• An alkane
• Alkene
• Alkyne
• Alkyl
15. Which of the following thermometers is used to measure human body temperature?
• Clinical
• Atmospheric
• Heating
• None of these
16. A cyclic hydrocarbon having an alternate single and double bond arrangement
• butene
• benzene
• cyclobutane
• hexene
17. The pencil leads are made mainly of which of the following?
• Lithium
• Charcoal
• Lead
• Graphite
18. If a molecule of an alkyne has 75 carbon atoms, then find the number of the hydrogen atom in it?
• 150
• 140
• 148
• 152
19. Solar cells are made from which of the following
• Silicon
• Sodium
• Potassium
• none of these
20. Near-sightedness or myopia can be corrected by which of the following lense ?
• Convex
• Concave
• Plane
• none of these
21. An object of mass 15 kg is movieng with a uniform velocity of 4 m/sec. What is the kinetic energy possesed by the object?
• 120 J
• 1200 J
• 12 J
• 12000 J
22. The chemical formula of Quicklime is
• CaO
• Ca(OH)2
• CaCO3
• CaSO4
23. Who discovered an atomic particle which has no charge i.e. neutron
• J. J. Thomson
• J. Chadwick
• Rutherford
• Bohr
24. The audible range of sound for human being extends about
• 20 Hz to 2000 Hz
• 20 Hz to 20000 Hz
• 20 Hz to 200 Hz
• 20 Hz to 20 kHz
25. According to the reactivity series of metals, the most reactive metal is
• Potassium
• Sodium
• Calcium
• Magnesium
26. Which of the following metals is the least reactive?
• Copper
• Mercury
• Silver
• Gold
27. The general formula of an alkane is
• CnH2n+1
• CnH2n+2
• CnH2n
• None of these
28. Rutherford’s alpha-particle scattering experiment was responsible for discovery of which of the following?
• Atomic nucleus
• Electron
• Proton
• Neutron
29. What is the speed of light in km/sec?
• 3,00,000
• 30,000
• 30,00,000
• 30
30. 80: Which of the following pairs of metals exists in their free state in nature?
• Ag and Hg
• Ag and Zn
• Au and Hg
• Au and Ag
31. In vaccum, the speed of light depends upon
• the wavelength
• the frequency
• the intensity of light
• none of these
32. The distance between two consecutive compressions or two consecutive rarefactions is called?
• Wavelength
• Amplitude
• Time period
• Frequency
33. Which one of the following is the correct electronic configuration of the atom?
• 2, 8
• 8, 2, 1
• 2, 1, 8
• 2, 8, 1
34. Which of the following is a physical change?
• Rusting of iron
• Combustion of magnesium ribbon
• Burning of a wax candle
• Melting of wax
35. Which of the following can be used to form a real image?
• Concave mirror only
• Plane mirror only
• Convex mirror only
• Both concave and convex mirror
36. The thread-like structure present in the nucleus are called
• Nucleus
• Genes
• Chromosome
• Ribosome
37. Which of the following is not a ductile material?
• Silver
• Sulphur
• Copper
• Aluminum
38. Which of the following reacts with cold water vigorously?
• Carbon
• Magnesium
• Sodium
• Sulphur
39. Which of the following is not a combustible substance?
• Camphor
• Straw
• Glass
• Alcohol
40. Which among the following is considered the cleanest fuel?
• Cowdung cake
• Kerosene
• Petrol
• Hydrogen gas
41. Which pair of elements of the following sets is likely to have __ behaviour?
• Na and Al
• Ar and K
• B and Ge
• N and P
42. An element that is intermediate between metals and non-metals is known as
• Noble gases
• Metalloid
• Actinides
• Lanthanides
43. How many periods are there in the periodic table?
• 3
• 5
• 7 <–
• 18
44. From top to bottom is a group of the periodic table, the electropositive character of the lement
• increases
• decreases
• remains unchanged
• none of these
45. The property which is shown by acid is
• they have sour taste
• they turn litmus red
• their pH is less than 7
• all of these
46. The indicator which produces a pink colour in an alkaline solution is
• Methyl orange
• phenolphthalein
• litmus paper
• none of these
47. The value of potential of hydrogen ion (pH) of pure water is
• 0
• 7 <–
• 14
• none of these
48. The power of a lense is defined as the __ of its focal length
• equal
• reciprocal
• neither equal nor reciprocal
• none of these
49. The SI unit of pressure is called
• newton
• galileo
• pascal
• none of these
50. The functional group present in propanol is
• OH
• –COOH
• –CO–
• –CHO
51. A neutral gas
• Argon
• Neon
• Helium
• Krypton
52. Bronze is an alloy of which of the following metals?
• Cu and Zn
• Cu and Sn
• Pb and Sn
• Hg and Sn
53. The number of electrons in chloride ion (Cl-) is
• 17
• 18
• 19
• 20
54. The rechargable battery used in a mobile phone handset
• lead ion battery
• sodium ion battery
• hydrogen ion battery
• lithium ion battery
55. Which one of the following properties is generally not
• Solubility of water
• Electrical conductivity in solid state
• High melting and high boiling point
• Electrical conductivity in the molten state
56. The potential difference between the live wire and the neutral wire in India?
• 110 V
• 50 V
• 220 V
• none of these
57. Which of the following colours of light undergoes the least deviate passing through a glass prism?
• Red
• Blue
• Yellow
• Green
58. Which of the following alloy contains mercury as __ constituents
• Stainless steel
• Solder
• Diuranium
• Zinc amalgam
59. An object is vibrating at 100 hertz. What is the time period?
• 0.01 sec
• 0.1 sec
• 0.02 sec
• None of these
60. An acid which can decolourise purple coloured potassium permanganate solution is
• Sulphuric acid
• Citric acid
• Carbonic acid
• Hydrochloric acid
61. The fuel which usually burns with blue flame is
• Coal
• LPG
• Candle wax
• Kerosene
62. Which of the following is not a greenhouse gas?
• Nitrogen gas
• Methane gas
• Water vapour
• Carbon dioxide
63. The number of particles (atoms, molecules or ions) present in 1 mole of a substance is
• 6.022 x 1023
• 60.22 x 1023
• 60.22 x 1032
• 6.022 x 1032
64. The chemical which is not required for the preparation of soap in laboratory is
• Vegetable oil
• Baking soda
• Caustic soda
• Common salt
65. The three elements having chemical symbols of Si, B and Ge are
• All metals
• all non-metals
• all metalloids
• none of these
66. the mass of 0.5 moles of N2 gas is
• 7 gm
• 14 gm
• 28 gm
• none of these
67. Which of the following sets of substances contains acids?
• Vinegar and soap
• Grapes and Lime water
• Curd and Milk of Magnesia
• Curd and Vinegar
68. Which of the following is not a strong acid?
• H2SO4
• HNO3
• CH3COOH
• HCl
69. A solution reacts with marble chips to produce a gas which turns ___ milky. The solution contains
• Na2SO4
• CaSO4
• H2SO4
• K2SO4
70. Which one of the following is not an organic acid?
• Ethanoic acid
• Formic acid
• Citric acid
• Carbonic acid
71. Who first proposed that light is wave-like in character?
• Huygens
• Newton
• Young
• Maxwell
72. Mass of an object is 10 kg. What is the weight on Earth?
• 9.8 N
• 98 N
• 8.9 N
• 89 N
73. Which one of the following solutions will not conduct electricity?
• Lemon juice
• Tap water
• Vinegar
• Vegetable oil
74. Redox reaction represent which of the following process(es).
• Only oxidation
• Only reduction
• Oxidation and Reduction
• none of these
75. Which of the following is not an oxidizing agent?
• O2
• KMnO4
• H2
• None of these
76. Which of the following raw material is available in the air of
• Oxygen
• Carbon dioxide
• Nitrogen
• Hydrogen
77. Which of the following will displace hydrogen from acids to form salts?
• Sulphur
• Phosphorus
• Sodium
• Silicon
78. The ‘near point’ of a normal human eye is
• 25 m
• 17 m
• 1 m
• 25 cm
79. Which of the following is an ore of Mercury metal?
• Rock salt
• Cinnabar
• Calamine
• Hematite
80. Which of the following molecules contains a triple bond?
• C2H4
• CCl4
• C2H2
• PH3
81. The calorific value of a fuel is expressed in a unit, called
• kJ/L
• kJ/ gm
• kJ/ml
• kJ/kg
82. The number of isomers formed by the hydrocarbon with a molecule C5H12 is
• 2
• 3
• 4
• 5
83. Mendeleev periodic table
• Atomic Mass
• Chemical reaction
• Atomic Number
• Valancy
84. Removal of hydrogen from a compound is known as
• Oxidation
• reduction
• combustion
• none of these
85. The atom of the same element, having the same atomic number but different _ number is known as
• Isobars
• Isotopes
• Isotones
• none of these
86. The chemical formula of Plaster of Peris is
• CaSO4.H2O
• CaSO4.2H2O
• CaSO4.(1/2)H2O
• none of these
87. Which energy is not derived from the Sun?
• Nuclear energy
• Wind energy
• Biomass energy
• Ocean wave energy
88. Which of the following is a renewable source of energy?
• Coal
• Natural Gas
• Wood
• Patroleum
89. Which of the following metals is the best conductor of electricity?
• Copper
• Gold
• Iron
• Silver
90. The salt which will give a neutral solution on dissolving in water will be
• CH3COONA
• NH4Cl
• KCl
• Na2CO3
91. Which of the following non-metallic solids is a conductor of electricity?
• Diamond
• Rubber
• Plastic
• Graphite
92. Which of the following is an insulator?
• Graphite
• Copper
• Sodium chloride solution
• Distilled water
93. A 4V bettery is connected to a lamp of resistance 4 ohms. The current flowing is?
• 0.1 A
• 1.0 A
• 10 A
• none of these
94. Joule/coulomb is the same as which of the following?
• Watt
• Volt
• Ampere
• Ohm
95. In which defect of vision, a person is not able to see near objects clearly?
• Hypermetropia
• Myopia
• Presbyopia
• None of these
96. Isotopes of an element have
• The same physical property
• Different chemical property
• Different number of neutrons
• Different atomic number
97. Which of the following mirror is widely used as rear-view mirrors in cars, scooters etc.?
• Concave
• Convex
• Plane
• None of these
98. Which of the following elements would yield a basic oxide?
• Sulphur
• Phosphorus
• Calcium
• Silicons
99. Which of the following mirror is used by dentists to examine teeth?
• Concave
• Convex
• Plane
• none of these
100. Which of the following is not a neutral oxide?
• CO
• H2O
• N2O
• Na2O

The candidates can download the official BSTET answer key for paper-1 by giving details such as registration number, roll number, and Date of birth on official Bihar BSEB website.

### How to download Bihar STET Answer Key 2019

• Candidates are advised to visit BSTET official websitebsebstet2019.in
• Click on “login” button and provide asked information
• There you will see the link to download Answer Key
• Select Your paper number and Download STET Answer Key PDF file

### BSTET Answer Key online Objections submission:

If you are not satisfied with the Bihar STET official answer key or you have doubts regarding the answer of any question then BSEB gave the option to submit your complaint and objections through online mode. Candidates can click on this link –> and then submit all the details regarding the wrong question-answer and then submit it. The Board can revise the answer and award a mark for the same.