Bihar polytechnic previous year question (Set 1) - Gk question and answer
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Sunday, September 27, 2020

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




... 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-




... Answer is C)
Explanation : no


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




... Answer is D)
Explanation : no.


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




... Answer is C)
Explanation : no.


5. Which of the following is vector quantity?




... Answer is A)
Explanation : no.


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




... 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-




... Answer is A)
Explanation : no.


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




... 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-




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


10. Which current is always used in homes?




... Answer is B)
Explanation : no.


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




... 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?




... Answer is B)
Explanation : no.


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




... Answer is B)
Explanation : no.


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




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


15. The railway track is made up of-




... Answer is A)
Explanation : no.


16. Which type of energy stored in spring scales?




... 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?




... 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?




... Answer is C)
Explanation : no.


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




... Answer is C)
Explanation : no.


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




... Answer is C)
Explanation : no.


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




... Answer is A)
Explanation : no.


22. Light wave is-




... Answer is C)
Explanation : no.


23. Escape velocity of any object from the earth-




... Answer is D)
Explanation : no.


24. Electron volt is the unit of




... Answer is B)
Explanation : no.


25. '1 Newton' is equal to




... Answer is B)
Explanation : no.


26. In any conductor flow of electric current means




... Answer is A)
Explanation : no.


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




... Answer is C)
Explanation : no.


28. In which medium speed of sound is maximum?




... Answer is C)
Explanation : no.


29. Sound energy is converted into electrical energy by




... Answer is B)
Explanation : no.


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




... Answer is A)
Explanation : no.


                           Chemistry


31. In 2FeCl₂+Cl₂, Cl₂ is-




... 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-




... Answer is B)
Explanation : no.


33. Which of the following statement is incorrect?




... Answer is A)
Explanation : no.


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




... Answer is D)
Explanation : no.


35. Who was the father of modern chemistry?




... Answer is B)
Explanation : no.


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




... 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-




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


38. Aqueous solution of FeCl₃ is-




... Answer is A)
Explanation : no.


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




... 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?




... Answer is A)
Explanation : no.


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




... Answer is B)
Explanation : no.


42. Rolled gold is-




... Answer is D)
Explanation : no.


43. Formula of Washing soda is-




... Answer is C)
Explanation : no.


44. Which of the following is natural silk?




... Answer is B)
Explanation : no.


45. Which oil is used in froth flotation method?




... Answer is D)
Explanation : no.


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




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


47. Nitrogen reacts with magnesium and formed




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


48. Which of the following is weak acid?




... Answer is B)
Explanation : no.


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




... Answer is C)
Explanation : no.


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




... 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?




... Answer is A)
Explanation : no.


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




... 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?




... Answer is D)
Explanation : no.


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




... Answer is B)
Explanation : no.


55. Which compound of nitrogen is used as fertilizer?




... Answer is C)
Explanation : no.


56. Which of the following is hydrocarbon?




... Answer is A)
Explanation : no.


57. What will pH value of basic solution?




... Answer is D)
Explanation : no.


58. Which of the following is alloy of aluminium?




... Answer is C)
Explanation : no.


59. What is the formula of Chloroform?




... Answer is A)
Explanation : no.


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




... 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?




... 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?




... Answer is C)
Explanation : no.


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




... Answer is A)
Explanation : no


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




... Answer is C)
Explanation : no.


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




... Answer is A)
Explanation : no.


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




... 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




... 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?




... 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?




... Answer is D)
Explanation : no.


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




... Answer is A)
Explanation : no.


71. If 3ˣ⁻²ⁿ=27,7³ˣ⁺ⁿ=1/49,then-




... 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-




... Answer is D)
Explanation : no.


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




... Answer is C)
Explanation : no.


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




... Answer is A)
Explanation : no.


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




... 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?




... Answer is C)
Explanation : no.


77. Area of equilateral triangle is equal to




... Answer is B)
Explanation : no.


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




... Answer is A)
Explanation : no.


79. The value of cos⁴θ-sin⁴θ is equal to




... Answer is D)
Explanation : no.


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




... Answer is A)
Explanation : no.


81. Which of the following is incorrect?




... Answer is C)
Explanation : no.


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




... Answer is B)
Explanation : no.


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




... Answer is C)
Explanation : no.


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




... Answer is A)
Explanation : no.


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




... Answer is B)
Explanation : no.


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




... Answer is A)
Explanation : no.


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




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


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




... Answer is D)
Explanation : no.


89. log125+log8=x.




... Answer is B)
Explanation : no.


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




... Answer is C)
Explanation : no.

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