Bihar polytechnic previous year question (Set 1)

In this post I provided a previous year question paper of Bihar Polytechnic entrance exam.If you are preparing for this entrance exam and want to qualify in it then practice on the following questions carefully.

                         

Bihar polytechnic previous year question (Set 1)

            

                             Physics

1. When the water freezes then distance between their molecules is

A) Do not change
B) Decrease
C) Increase
D) Can not say something

... Answer is B)
Explanation : no.

2. A horse pull any car 10 meters through the force of 40N.The total work done by the horse is-

A) 4 Joule
B) 0.25 Joule
C) 400 Joule
D) 40 Joule

... Answer is C)
Explanation : no

3. The maximum pressure in a bottle filled with water is-

A) On the top surface of the bottle
B) On the lower surface of the bottle
C) In the middle of the bottle
D) In the bottom of the bottle

... Answer is D)
Explanation : no.

4. The time period of hour needle in a watch is-

A) 60 Seconds
B) 60 minutes
C) 12 hours
D) 24 hours

... Answer is C)
Explanation : no.

5. Which of the following is vector quantity?

A) Velocity
B) Mass
C) Distance
D) Speed

... Answer is A)
Explanation : no.

6. The flow of heat in two substance depends upon-

A) Their mass
B) Their heat difference
C) Their shape
D) The amount of their heat

... Answer is B)
Explanation : Heat always flow from high temperature to low temperature.

7. When any object covers the same distance in same time period,Then their motion is-

A) Uniform
B) Ununiform
C) Accelerated
D) None of these

... Answer is A)
Explanation : no.

8. If any plane mirror turned from 10° then reflected beam turned-

A) 0°
B) 10°
C) 20°
D) 30°

... Answer is C)
Explanation : no.

9. There is a object Infront of a convex lens and 9cm away from their focus.Real,inverse and big image make 16cm away from focus,Then the focus length will be-

A) -12cm
B) 12cm
C) -24cm
D) 24cm

... Answer is B)
Explanation : Use the lens formula .

10. Which current is always used in homes?

A) Direct current
B) Alternating current
C) Both
D) None of these

... Answer is B)
Explanation : no.

11. In domestic electric circuit all devices work on 220 volt.What does this mean?

A) All are of equal current
B) All are of equal resistance
C) Connected in series order
D) Connected in parallel order

... Answer is D)
Explanation : no.

12. When in electric circuit two bulbs of 100 watt and 40 watt connects in series order then which bulb will more shine?

A) 100 watt
B) 40 watt
C) Both
D) None of these

... Answer is B)
Explanation : no.

13. The value of magnetic induction under any selenoid is-

A) 0
B) Increase with distance from the axis
C) Decrease with distance from the axis
D) None of these

... Answer is B)
Explanation : no.

14. Mass of a object is 50Kg,Then their weight is-

A) 9.8N
B) 50N
C) 400N
D) 490N

... Answer is D)
Explanation : Use the formula W=mg.

15. The railway track is made up of-

A) Steel
B) Iron
C) Copper
D) Aluminium

... Answer is A)
Explanation : no.

16. Which type of energy stored in spring scales?

A) Kinetic energy
B) Potential energy
C) Electrical energy
D) Chemical energy

... Answer is B)
Explanation : no.

17. An object is moving from rest by the acceleration of 2m/s².What is the distance covered by object in 5 sec?

A) 15m
B) 25m
C) 50m
D) 500m

... Answer is B)
Explanation : Use the formula ut+½at² where,u=initial velocity,t=time and a=acceleration.

18. The velocity of two objects of equal mass are V and 3V respectively, Then what will ratio of their kinetic energy?

A) 1:3
B) 3:1
C) 1:9
D) 9:1

... Answer is C)
Explanation : no.

19. At which temperature the value of centigrade and Fahrenheit is equal?

A) -140°
B) 40°
C) -40°
D) 100°

... Answer is C)
Explanation : no.

20. How much energy consumed by a 20 watt bulb in 20 hours?

A) 2000 Unit
B) 20 Unit
C) 2 Unit
D) 5 Unit

... Answer is C)
Explanation : no.

21. What is the value of latent heat of melt of ice?

A) 80 calories/gram
B) 42 calories/gram
C) 8.42 calories/gram
D) 0.8 calories/gram

... Answer is A)
Explanation : no.

22. Light wave is-

A) Compressional
B) Longitudinal
C) Transverse
D) All of these

... Answer is C)
Explanation : no.

23. Escape velocity of any object from the earth-

A) Depends upon shape of object
B) Depends upon mass of object
C) Depends upon density of object
D) Free from the mass of object

... Answer is D)
Explanation : no.

24. Electron volt is the unit of

A) Current
B) Energy
C) Charge
D) Magnetic field

... Answer is B)
Explanation : no.

25. '1 Newton' is equal to

A) 1 Kg-m/s
B) 1 Kg-m/s²
C) 1 Kg/s²
D) 1 g-m/s²

... Answer is B)
Explanation : no.

26. In any conductor flow of electric current means

A) Flow of electon
B) Flow of proton
C) Flow of neutron
D) Flow of electron,proton and neutron

... Answer is A)
Explanation : no.

27. The value of time period of a sound wave is 0.001. calculate the frequency of sound.

A) 1 Hz
B) 100 Hz
C) 1000 Hz
D) 10000 Hz

... Answer is C)
Explanation : no.

28. In which medium speed of sound is maximum?

A) Glass
B) Water
C) Steel
D) Diesel

... Answer is C)
Explanation : no.

29. Sound energy is converted into electrical energy by

A) Speaker
B) Microphone
C) Electric motor
D) Television

... Answer is B)
Explanation : no.

30. Weight of an object is 50N on the earth.At which place their weight is zero?

A) on the centre of earth
B) In sea
C) In air
D) On mars planet

... Answer is A)
Explanation : no.

                           Chemistry

31. In 2FeCl₂+Cl₂, Cl₂ is-

A) Oxidizing agent
B) Reducing agent
C) Catalyst
D) All of above

... Answer is B)
Explanation : no.

32. If specific heat of any material is 0.1 and equivalent weight is 32.28,Then atomic weight of that material is-

A) 46.54
B) 64.56
C) 56.46
D) 32.28

... Answer is B)
Explanation : no.

33. Which of the following statement is incorrect?

A) Atoms are indivisible
B) The molecules are formed by the coincidence of atoms
C) All atoms of the same element are same
D) Atomic properties of the same element are same

... Answer is A)
Explanation : no.

34. In nuclear reactor control rods are made up of-

A) Copper
B) Carbon
C) Iron
D) Cadmium

... Answer is D)
Explanation : no.

35. Who was the father of modern chemistry?

A) Priestly
B) Lavoisier
C) John Dalton
D) James Chadwick

... Answer is B)
Explanation : no.

36. In pressure cooker cooking process is done quickly because-

A) Boiling point of water is decreased
B) Boiling point of water is increased
C) Pressure is constant
D) None of these

... Answer is B)
Explanation : In pressure cooker water is heat on high temperature therefore boiling point of water is increased and cooking process is done quickly.

37. The percentage of water in blue stone (CuSO₄.5H₂O) is-

A) 16%
B) 24%
C) 36%
D) 57%

... Answer is C)
Explanation : Atomic weight of Cu=63.5,S=32,O=16,H=1.

38. Aqueous solution of FeCl₃ is-

A) Acidic
B) Alkaline
C) Basic
D) All of above

... Answer is A)
Explanation : no.

39. What will form at the anode in the electrolysis of an aqueous solution of sodium chloride?

A) Sodium atom
B) Na⁺
C) Cl⁻
D) NaCl

... Answer is C)
Explanation : Because anode have positive charge so negative charge (Cl⁻) is attract on anode.

40. The rate of diffusion of hydrogen is five times from rate of diffusion of another gas X.What is the atomic weight of X?

A) 50
B) 20
C) 70
D) 90

... Answer is A)
Explanation : no.

41. When we go from left to right in a periodic table then-

A) Ionic radius of elements is increased
B) Basic nature of oxides of the elements is decreased
C) A or B both
D) None of these

... Answer is B)
Explanation : no.

42. Rolled gold is-

A) Phosphor bronze
B) German silver
C) Copper bronze
D) Aluminium bronze

... Answer is D)
Explanation : no.

43. Formula of Washing soda is-

A) Na₂SO₄
B) Na₂CO₃
C) Na₂CO₃.10H₂O
D) Na₂SO₄.10H₂O

... Answer is C)
Explanation : no.

44. Which of the following is natural silk?

A) Polyester
B) Polyamide
C) Polyamine
D) Polysaccharide

... Answer is B)
Explanation : no.

45. Which oil is used in froth flotation method?

A) Mustard oil
B) Kerosene oil
C) Castor oil
D) Pine oil

... Answer is D)
Explanation : no.

46. What is the I.U.P.A.C name of CHCl₃?

A) Trichloroethylene
B) Trichloromethane
C) Trichloroethane
D) Trichlorohexane

... Answer is B)
Explanation : The common name of trichloromethane is chloroform.

47. Nitrogen reacts with magnesium and formed

A) MgN
B) Mg₃N
C) Mg₂N₃
D) Mg₃N₂

... Answer is D)
Explanation : 3Mg+N₂→Mg₃N₂.

48. Which of the following is weak acid?

A) HCl
B) CH₃COOH
C) H₂SO₄
D) HNO₃

... Answer is B)
Explanation : no.

49. How many numbers of electrons in outermost shell of halogen?

A) 8
B) 0
C) 7
D) 5

... Answer is C)
Explanation : no.

50. What is the basis of rationalization of elements in modern periodic table?

A) Atomic weight
B) Atomic number
C) Atomic volume
D) Atomic density

... Answer is B)
Explanation : Modern periodic table was developed by Mendeleev.

51. Volume of any gas is 300ml at 27°C.If temperature of that gas is increased 127°C at constant pressure then what will volume of gas?

A) 400ml
B) 576ml
C) 450ml
D) 600ml

... Answer is A)
Explanation : no.

52. Electronic configuration of an element is 2,8,2.This element is-

A) Alloy
B) Metal
C) Nonmetal
D) Halogen

... Answer is B)
Explanation : That metal is magnesium.

53. Atomic weight of sodium is 23 and atomic number is 11.What will numbers of electrons, neutrons and protons continuously?

A) 11,11,12
B) 12,11,11
C) 12,11,12
D) 11,12,11

... Answer is D)
Explanation : no.

54. How many numbers of atoms in one mole silver?

A) 47
B) 6.022×10²³
C) 6.022×10¹¹
D) 6.022×10²²

... Answer is B)
Explanation : no.

55. Which compound of nitrogen is used as fertilizer?

A) Nitric acid
B) Nitroglycerin
C) ammonium sulphate
D) Silver nitrate

... Answer is C)
Explanation : no.

56. Which of the following is hydrocarbon?

A) Butane
B) Chloroform
C) Alcohol
D) Chlorobenzene

... Answer is A)
Explanation : no.

57. What will pH value of basic solution?

A) pH=0
B) pH>7
C) pH=10
D) pH=7

... Answer is D)
Explanation : no.

58. Which of the following is alloy of aluminium?

A) Brass
B) Stainless steel
C) Duralumin
D) Steel

... Answer is C)
Explanation : no.

59. What is the formula of Chloroform?

A) CCl₄
B) CH₃Cl
C) CCl₃
D) CH₂Cl₂

... Answer is A)
Explanation : no.

60. If Ph value of any solution is 8 then that solution is

A) Acidic
B) Alkaline
C) Basic
D) None of these

... Answer is B)
Explanation : no.

                       MATHEMATICS

61. Before 5 years age of A is five times of age of B and after 10 years age of A will two times of B, What is the present age of A and B?

A) 20,50
B) 50,20
C) 50,60
D) 40,20

... Answer is B)
Explanation : no.

62. Price of 4 chairs and 7 tables is 3600 rupees and price of 6 chairs and 10 tables is 5200 rupees,then what will price of one chair and one table?

A) 100,200
B) 100,150
C) 200,400
D) 100,500

... Answer is C)
Explanation : no.

63. The sum of squares of two consecutive even numbers is 244.That two numbers are-

A) 10 and 12
B) 14 and 16
C) 8 and 10
D) 11 and 12

... Answer is A)
Explanation : no

64. If a³=117+b³ and a=3+b,then the value of a+b is

A) 0
B) 49
C) +7,-7
D) +13,-13

... Answer is C)
Explanation : no.

65. The factor of 4x⁸+16x⁴y⁴+25y⁸ are-

A) (2x⁴+5y⁴+2x²y²)(2x⁴+5y⁴-2x²y²)
B) (2x⁴-5y⁴+2x²y²)(2x⁴+5y⁴-2x²y²)
C) (2x⁴+5y⁴+2x²y²)(2x⁴-16y⁴-20xy)
D) (2x⁴+5y⁴+2x²y²)(2x⁴+16y⁴-20xy)

... Answer is A)
Explanation : no.

66. If x-y=1 and x²+y²=41 then the value of x+y is-

A) +9,-9
B) +1,-1
C) 5,4
D) +7,-7

... Answer is A)
Explanation : no.

67. If angles of a cyclic quadrilateral are A,B,C and D,then the value of cosA+cosB+cosC+cosD is

A) 2(cosA-cosC)
B) 2(cosA+cosB)
C) 0
D) 1

... Answer is C)
Explanation : no.

68. If radius of base and height of a vertical cone is increased 20%,then what will percentage growth in volume of cone?

A) 40%
B) 68%
C) 78%
D) 96%

... Answer is B)
Explanation : no.

69. If curve surface area of cylindrical column is 20m² and volume is 924m³.What will ratio of its diameter and height?

A) 3:7
B) 7:6
C) 6:7
D) 7:3

... Answer is D)
Explanation : no.

70. If root of any quadratic equation is 4 and 5,then equation will-

A) x²-9x+20=0
B) x²+9x+20=0
C) x²-20x+9=0
D) 9x²-x+20=0

... Answer is A)
Explanation : no.

71. If 3ˣ⁻²ⁿ=27,7³ˣ⁺ⁿ=1/49,then-

A) x=-1/7,n=-11/7
B) x=1/7,n=5/7
C) x=2/3,n=-3/9
D) x=-5/6,y=-9/5

... Answer is A)
Explanation : no.

72. If any quantity is doubled in four years from rate of compound interest.For same rate that quantity will sixteen times in-

A) 2 years
B) 8 years
C) 12 years
D) 16 years

... Answer is D)
Explanation : no.

73. In an equilateral triangle ABC, side AB is median of AB,then CD² is equal to

A) AB²
B) 2AB²
C) 3/4 AB²
D) 4/3 AB²

... Answer is C)
Explanation : no.

74. What is the ratio of volume of a sphere which radius is 5cm and 7cm?

A) 125:343
B) 5:7
C) 25:49
D) 49:25

... Answer is A)
Explanation : no.

75. The diameter of a wheel is 4m then how far distance will cover by wheel in 400 revolution?

A) 2600π m
B) 1600π m
C) 1600 m
D) 400 m

... Answer is B)
Explanation : no.

76. If side of any square is increased by four times then what will ratio of area of resultant square and given square?

A) 4:1
B) 1:16
C) 16:1
D) 1:4

... Answer is C)
Explanation : no.

77. Area of equilateral triangle is equal to

A) Product of one side and one altitude
B) Half of product of one side and one altitude
C) Double of product of one side and one altitude
D) Half of product of two sides

... Answer is B)
Explanation : no.

78. What will value of sin42º.cos48º+cos42º.sin48º?

A) 1
B) Less than 1
C) more than 1
D) None of these

... Answer is A)
Explanation : no.

79. The value of cos⁴θ-sin⁴θ is equal to

A) sin²θ-cos²θ
B) (sin²θ+cos²θ)(sinθ+cosθ)
C) (sinθ+cosθ)(sinθ-cosθ)
D) (sinθ+cosθ)(cosθ-sinθ)

... Answer is D)
Explanation : no.

80. If tanΘ=12/5,then value of sinθ is equal to

A) 12/13
B) 13/12
C) 5/12
D) 13/5

... Answer is A)
Explanation : no.

81. Which of the following is incorrect?

A) 20%=0.2
B) 62%=0.62
C) 0.001%=0.0001
D) 0.01%=0.0001

... Answer is C)
Explanation : no.

28. Sum of two numbers is 8 and different is 4,then one number is-

A) 5
B) 6
C) 7
D) 8

... Answer is B)
Explanation : no.

83. Which of the following graph is parallel to X-axis?

A) x+y=4
B) x=4
C) y=4
D) y=-x

... Answer is C)
Explanation : no.

84. If h(x)=x²-2,x∈R then which of the following statement is incorrect

A) h(0)=2
B) h(10)=98
C) h(2)=2
D) h(a²)=a²-2

... Answer is A)
Explanation : no.

85. X={1,2,3,4},Y={1,6,7,8} then what will value of X∩Y?

A) {2,3,4}
B) {1}
C) {6,7,8}
D) {1,2,3,4,5,6,7,8}

... Answer is B)
Explanation : no.

86. (a+b)c=ac+bc, which of the following rule is used in above equation?

A) Distribution rules rule
B) Law of association
C) Rule of exchange
D) Supplementary rule

... Answer is A)
Explanation : no.

87. If a+b=6 and ab=5,then what will value of a-b?

A) 2
B) 4
C) 8
D) 10

... Answer is B)
Explanation : Use the formula (a-b)²=(a+b)²-4ab.

88. What is the class mark of 50-56?

A) 50
B) 56
C) 106
D) 53

... Answer is D)
Explanation : no.

89. log125+log8=x.

A) 0
B) 3
C) 5
D) 13

... Answer is B)
Explanation : no.

90. If two angle of any triangle is 50° and 60° then that triangle is-

A) Right angle triangle
B) Equilateral triangle
C) Asymmetrical triangle
D) Isosceles triangle

... Answer is C)
Explanation : no.