ECAT (Practice Test) FLP 15 Free Quiz

Chemis

Comput

Englis

Maths

Physic

ECAT (Practice Test) – FLP 15 consists of 130 MCQs covering 5 subjects. You have 100 minutes to complete it. Start with the easier questions and manage your time wisely. Good luck!

Chemistry 30 MCQs

1. The radius of the first Bohr orbit of hydrogen (Bohr radius) is approximately:

A. 0.529 Å B. 0.529 nm C. 0.529 pm D. 0.529 μm

2. The Pauli exclusion principle states that no two electrons in an atom can have the same set of:

A. Four quantum numbers B. Three quantum numbers C. Two quantum numbers D. One quantum number

3. The atomic number of an element is 17. Its electron configuration is:

A. 1s² 2s² 2p⁶ 3s² 3p⁵ B. 1s² 2s² 2p⁶ 3s² 3p⁶ C. 1s² 2s² 2p⁶ 3s² 3p⁴ D. 1s² 2s² 2p⁶ 3s² 3p³

4. The spectral lines in the hydrogen atom arise due to transitions between:

A. Energy levels B. Orbitals C. Nuclei D. Molecules

5. The Paschen series of hydrogen lies in the:

A. Infrared region B. UV region C. Visible region D. X-ray region

6. The Rydberg constant is approximately:

A. 1.097 × 10⁷ m⁻¹ B. 1.097 × 10⁷ m C. 1.097 × 10⁻⁷ m⁻¹ D. 1.097 × 10⁷ s⁻¹

7. The dual nature of electrons was proposed by:

A. De Broglie B. Bohr C. Rutherford D. Thomson

8. The wave-particle duality of electrons was experimentally confirmed by:

A. Davisson and Germer B. Thomson C. Rutherford D. Millikan

9. The ionization energy generally increases across a period because:

A. Nuclear charge increases and atomic size decreases B. Nuclear charge decreases C. Atomic size increases D. Shielding increases

10. The bond formed by the transfer of electrons from one atom to another is called:

A. Ionic bond B. Covalent bond C. Metallic bond D. Co-ordinate bond

11. The bond in HCl is:

A. Covalent B. Ionic C. Metallic D. Hydrogen

12. The bond angle in ammonia (NH₃) is approximately:

A. 107° B. 109.5° C. 104.5° D. 120°

13. The shape of NH₃ is:

A. Trigonal pyramidal B. Tetrahedral C. Bent D. Trigonal planar

14. The bond order in C₂H₂ (ethyne) between two carbons is:

A. 3 B. 2 C. 1 D. 1.5

15. The hybridisation of nitrogen in ammonia is:

A. sp³ B. sp² C. sp D. sp³d

16. The pi (π) bond is formed by:

A. Side-on overlap of p orbitals B. End-on overlap C. Overlap of s orbitals D. Overlap of d orbitals

17. The equilibrium constant is temperature dependent. For an exothermic reaction, increasing temperature will:

A. Decrease K B. Increase K C. No change D. Increase or decrease depending on pressure

18. The equilibrium constant for the reaction H₂ + I₂ ⇌ 2HI is K. What is K for ½H₂ + ½I₂ ⇌ HI?

A. √K B. K² C. K D. 1/K

19. The common ion effect is an application of Le Chatelier's principle. It is observed when:

A. An ion common to an equilibrium is added B. A catalyst is added C. Temperature changes D. Pressure changes

20. A solution with pH > 7 is:

A. Basic B. Acidic C. Neutral D. Salt

21. A buffer solution resists changes in pH upon addition of small amounts of acid or base. It consists of a:

A. Weak acid and its salt with strong base B. Strong acid and its salt C. Strong base and its salt D. Neutral salt

22. For a weak acid HA, the expression for Ka is:

A. Ka = [H⁺][A⁻]/[HA] B. Ka = [HA]/[H⁺][A⁻] C. Ka = [H⁺][HA]/[A⁻] D. Ka = [A⁻]/[H⁺][HA]

23. The relationship between Ka and Kb for a conjugate acid-base pair is:

A. Ka × Kb = Kw B. Ka / Kb = Kw C. Ka + Kb = Kw D. Ka = Kb

24. A salt of a strong acid and weak base (e.g., ammonium chloride) will hydrolyze to give a solution that is:

A. Acidic B. Basic C. Neutral D. Amphoteric

25. The Nernst equation relates cell potential to concentrations. For the reaction aA + bB ⇌ cC + dD, the Nernst equation is:

A. E = E° - (RT/nF) ln Q B. E = E° + (RT/nF) ln Q C. E = E° - (RT/nF) log Q D. E = E° + (RT/nF) log Q

26. Faraday's second law states that when the same charge passes through different electrolytes, the masses deposited are proportional to:

A. Equivalent weights B. Atomic masses C. Molar masses D. Valencies

27. In a hydrogen fuel cell, the reaction at the cathode is:

A. O₂ + 4H⁺ + 4e⁻ → 2H₂O B. H₂ → 2H⁺ + 2e⁻ C. 2H⁺ + 2e⁻ → H₂ D. O₂ + 2H₂O + 4e⁻ → 4OH⁻

28. In the reaction Zn + Cu²⁺ → Zn²⁺ + Cu, the oxidizing agent is:

A. Cu²⁺ B. Zn C. Zn²⁺ D. Cu

29. A substance with lower reduction potential is a better:

A. Reducing agent B. Oxidizing agent C. Electrolyte D. Conductor

30. In electrolysis of aqueous NaCl, the product at anode is:

A. Cl₂ B. O₂ C. H₂ D. Na

Computer Science 30 MCQs

31. Which SQL command modifies existing records?

A. UPDATE B. SELECT C. INSERT D. DELETE

32. Which of these is a type of memory hierarchy?

A. Register, Cache, RAM, Hard disk B. CPU, Monitor, Keyboard C. ALU, CU, PC D. Data, Address, Control

33. The hexadecimal equivalent of decimal 15 is:

A. F B. E C. D D. C

34. A derived attribute is:

A. An attribute that can be calculated from other attributes B. An attribute that cannot be null C. A primary key D. A composite attribute

35. The switch statement is preferred over if-else if when:

A. Testing a single variable against many constants B. Testing complex conditions C. Using loops D. Defining functions

36. A NOT gate (inverter) has:

A. One input and one output B. Two inputs and one output C. One input and two outputs D. Multiple inputs

37. An XOR gate outputs 1 when:

A. Inputs are different B. Inputs are same C. Both are 1 D. Both are 0

38. The binary addition of 1 + 1 results in:

A. 10 (2) B. 0 C. 1 D. 11

39. A full adder adds:

A. Three bits (including carry-in) B. Two bits C. Two bytes D. Four bits

40. Which statement is used to exit a loop early in C?

A. break B. continue C. exit D. return

41. Which of these is the correct way to define a structure in C?

A. struct student { int id; char name[20]; }; B. struct student { int id; char name[20]; } C. structure student { int id; char name[20]; }; D. Both A and B

42. Which of these is a web browser?

A. Google Chrome B. Windows C. Linux D. Python

43. What is the difference between the Internet and an intranet?

A. Internet is public; intranet is private B. Intranet is public; Internet is private C. They are the same D. Intranet is larger

44. The OSI model has how many layers?

A. 7 B. 5 C. 4 D. 6

45. Which network device amplifies or regenerates a signal?

A. Repeater B. Router C. Switch D. Bridge

46. A light pen is a:

A. Light-sensitive input device B. Output device C. Storage device D. Network device

47. Which of these is an example of an operating system?

A. Windows 10 B. Microsoft Word C. Adobe Photoshop D. Google Chrome

48. Which data type in Access is used for long text (up to 65,535 characters)?

A. Long Text B. Text C. Number D. Memo

49. What is a query in Access?

A. A question or request for data from tables B. A type of table C. A type of report D. A type of form

50. A form can be based on:

A. A table or a query B. Only a table C. Only a query D. Only another form

51. A command button on a form can be used to:

A. Run a macro or VBA code B. Enter data C. Display data D. Print a report

52. A barcode reader is used for:

A. Reading barcodes into a computer B. Displaying barcodes C. Printing barcodes D. Storing barcode data

53. Which of these is not a peripheral device?

A. CPU B. Printer C. Mouse D. Keyboard

54. Which function is used to add a range of numbers in Excel?

A. SUM B. AVERAGE C. COUNT D. MAX

55. Which function returns the lowest value in a range?

A. MIN B. MAX C. SUM D. AVERAGE

56. Which function is used to count non-blank cells in a range?

A. COUNTA B. COUNT C. COUNTBLANK D. SUM

57. In a relational database, a table is also known as:

A. A relation B. A file C. A record D. A field

58. Which SQL statement is used to add new records to a table?

A. INSERT INTO B. SELECT C. UPDATE D. DELETE

59. What is the purpose of the Device Manager?

A. To view and manage hardware devices and drivers B. To manage files C. To change display settings D. To manage user accounts

60. What is the PowerShell in Windows?

A. A command-line shell and scripting language B. A file manager C. A web browser D. A text editor

English 10 MCQs

61. The word "fatigue" means:

A. Extreme tiredness B. Excitement C. Hunger D. Thirst

62. Which of the following is NOT a benefit mentioned?

A. Increased wealth B. Emotional support C. Reduced stress D. Personal growth

63. What is the meaning of "encourage"?

A. Support and motivate B. Discourage C. Ignore D. Criticize

64. What is the meaning of "abundant"?

A. Plentiful B. Scarce C. Rare D. Limited

65. The passage suggests that renewable energy is:

A. Worth the investment B. Not worth the cost C. Only for the future D. Ineffective

66. What is a problem mentioned in education?

A. Lack of access for many children B. Too many schools C. Too much funding D. Overqualified teachers

67. The tone of the passage is:

A. Urgent and concerned B. Careless C. Indifferent D. Humorous

68. What can obesity and heart disease be prevented by?

A. Reducing sugar, salt, and saturated fats B. Eating more sugar C. Eating more salt D. Eating more fat

69. Read the passage: "Sleep is essential for physical and mental restoration. During sleep, the brain processes information, stores memories, and removes toxins. Adults typically need 7-9 hours of quality sleep per night. Poor sleep is linked to weakened immune function, weight gain, and mood disorders." What is the main idea?

A. Sleep is crucial for health and brain function B. Sleep is a luxury C. Sleep is not important D. Sleep causes weight loss

70. What is "toxins"?

A. Harmful substances B. Nutrients C. Vitamins D. Minerals

Maths 30 MCQs

71. What is the next term of the sequence 3, 6, 12, 24?

A. 48 B. 36 C. 72 D. 30

72. What is the sum of the first 5 terms of an arithmetic sequence with first term 2 and common difference 3?

A. 40 B. 35 C. 45 D. 30

73. What is the slope of a vertical line?

A. Undefined B. 0 C. 1 D. -1

74. What is the equation of the x-axis?

A. y = 0 B. x = 0 C. y = 1 D. x = 1

75. What is the area of a triangle with vertices (0,0), (4,0), (0,3)?

A. 6 B. 12 C. 3 D. 4

76. What is the area of the triangle with vertices (0,0), (5,0), and (0,4)?

A. 10 B. 20 C. 5 D. 15

77. What is the slope of the line 4x - 2y = 8?

A. 2 B. -2 C. 4 D. -4

78. What is the derivative of f(x) = 1/x?

A. -1/x² B. 1/x² C. -1/x D. 1/x

79. What is the derivative of f(x) = tan x?

A. sec² x B. csc² x C. -sec² x D. sec x tan x

80. What is the derivative of f(x) = ln(5x)?

A. 1/x B. 5/x C. 1/(5x) D. ln 5

81. What is ∫ (2x) / (x²+1) dx?

A. ln(x²+1) + C B. 2 ln(x²+1) + C C. 1/(x²+1) + C D. ln(x²+1)/2 + C

82. What is the conjugate of 3-4i?

A. 3+4i B. -3+4i C. 3-4i D. -3-4i

83. What is the value of i²?

A. -1 B. 1 C. i D. -i

84. What is the argument of 1 + i?

A. 45° B. 135° C. 225° D. 315°

85. Which of the following is not a property of equality?

A. Transitive B. Symmetric C. Reflexive D. Distributive

86. What is the value of x in the equation 2x+3=7?

A. 2 B. 3 C. 1 D. 4

87. What is the next term in the sequence 3,6,12,24?

A. 48 B. 36 C. 72 D. 30

88. What is the 12th term of A.P with first term 3 and common difference 5?

A. 58 B. 53 C. 60 D. 55

89. What is the common difference of sequence 12, 8, 4, 0?

A. -4 B. 4 C. 0 D. -2

90. What is the sum of probabilities of all outcomes in a sample space?

A. 1 B. 0 C. >1 D. <1

91. What is the mode of the data set 1, 1, 2, 3, 3, 3, 4?

A. 3 B. 1 C. 2 D. 4

92. What is the median of 10, 20, 30, 40, 50?

A. 30 B. 20 C. 40 D. 10

93. What is the median of 1, 3, 5, 7, 9?

A. 5 B. 3 C. 7 D. 1

94. What is the probability of getting a 1 on a die?

A. 1/6 B. 1/2 C. 1/3 D. 1/4

95. What is the value of cos 60°?

A. 1/2 B. √3/2 C. 1 D. 0

96. What is the value of cos 360°?

A. 1 B. 0 C. -1 D. 1/2

97. What is the period of tan x?

A. π B. 2π C. π/2 D. 2π

98. What is the unit vector in the direction of (3,4)?

A. (3/5, 4/5) B. (3,4) C. (5/3, 5/4) D. (4/5, 3/5)

99. What is the dot product of (1,2,3) and (4,5,6)?

A. 32 B. 24 C. 28 D. 30

100. What is the vector triple product?

A. A×(B×C) B. A·(B×C) C. (A·B)C D. All of the above

Physics 30 MCQs

101. Ohm's law states that the current through a conductor is directly proportional to:

A. Voltage B. Resistance C. Power D. Charge

102. The internal resistance of a cell is due to:

A. Electrolyte resistance B. Plate resistance C. Both A and B D. External load

103. The magnetic force does no work because:

A. It is perpendicular to displacement B. It is parallel to displacement C. It is zero D. It is conservative

104. The principle of a moving coil galvanometer is:

A. Torque on a current-carrying coil in a magnetic field B. Force on a moving charge C. Electromagnetic induction D. Mutual induction

105. The force between two charges is inversely proportional to:

A. Square of distance between them B. Distance C. Cube of distance D. Square root of distance

106. The electric potential at infinity is taken as:

A. Zero B. Infinite C. One D. Undefined

107. The value of g is maximum at:

A. Poles B. Equator C. Centre of Earth D. At a height of 100 km

108. The orbital velocity of a satellite near Earth's surface is approximately:

A. 7.9 km/s B. 11.2 km/s C. 5 km/s D. 10 km/s

109. The acceleration due to gravity at a height h above the Earth's surface (h << R) is:

A. g(1 - 2h/R) B. g(1 + 2h/R) C. g(1 - h/R) D. g(1 + h/R)

110. The efficiency of a Carnot engine depends on the temperatures of the:

A. Hot and cold reservoirs B. Working substance C. Amount of heat D. Pressure

111. The molar specific heat at constant volume C_v is related to C_p by:

A. C_p - C_v = R B. C_v - C_p = R C. C_p + C_v = R D. C_p / C_v = R

112. For a reversible adiabatic process of an ideal gas, the temperature and volume are related by:

A. TV^(γ-1) = constant B. TV^γ = constant C. T/V^(γ-1) = constant D. PV = constant

113. An object is in equilibrium when the net force acting on it is:

A. Zero B. Maximum C. Constant D. Changing

114. Gravitational potential energy near Earth's surface is:

A. U = mgh B. U = ½mgh C. U = mg/h D. U = gh

115. Power is defined as:

A. Work done per unit time B. Force per unit time C. Energy per unit distance D. Force × velocity

116. The magnitude of the resultant of two vectors is maximum when the angle between them is:

A. 0° B. 90° C. 180° D. 45°

117. The components of a vector A in 2D are:

A. A_x = A cosθ, A_y = A sinθ B. A_x = A sinθ, A_y = A cosθ C. A_x = A tanθ D. A_x = A, A_y = A

118. The de Broglie wavelength of a particle is given by:

A. λ = h/p B. λ = p/h C. λ = h m D. λ = h/(mv)

119. The special theory of relativity deals with:

A. Objects moving at constant velocity (inertial frames) B. Accelerated frames C. Gravitational fields D. Electromagnetic waves

120. Snell's law is given by:

A. n₁ sin i = n₂ sin r B. n₁ sin r = n₂ sin i C. sin i / sin r = n₂ / n₁ D. Both A and C

121. A virtual image cannot be formed on a screen because:

A. Light rays only appear to diverge from the image B. Light rays converge C. It is inverted D. It is too small

122. The angular momentum L of a rotating rigid body is given by:

A. L = I ω B. L = m v C. L = I α D. L = r × F

123. If no external torque acts on a system, its angular momentum remains:

A. Constant B. Zero C. Increasing D. Decreasing

124. For a solid cylinder rolling down an incline, the acceleration is:

A. a = 2/3 g sinθ B. a = g sinθ C. a = 1/2 g sinθ D. a = 3/2 g sinθ

125. In a transverse wave, the particle displacement is:

A. Perpendicular to the direction of propagation B. Parallel to the direction C. At 45° D. Circular

126. The pitch of a sound depends on its:

A. Frequency B. Amplitude C. Wavelength D. Speed

127. The kinetic energy of an object of mass m moving with speed v is given by:

A. K = ½ m v² B. K = m v C. K = m v² D. K = ½ m v

128. A body of mass 5 kg is moving with a speed of 4 m/s. Its kinetic energy is:

A. 40 J B. 20 J C. 80 J D. 10 J

129. A 3Ω and a 6Ω resistor are connected in parallel across a battery. What is the ratio of power dissipated in the 3Ω resistor to the 6Ω resistor?

A. 1:2 B. 1:1 C. 3:1 D. 2:1

130. Two 10Ω resistors are connected in parallel to a battery. If one resistor is replaced by a 20Ω resistor, what is the percentage change in the total current?

A. Decreases by 25% B. Increases by 25% C. Decreases by 50% D. Increases by 50%

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