Engineering Entrance

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Q. The half-life of a first-order reaction is independent of the initial concentration of the reactant. What is the formula for the half-life (t1/2) of a first-order reaction? (2020)
  • A. t1/2 = 0.693/k
  • B. t1/2 = k/0.693
  • C. t1/2 = 1/k
  • D. t1/2 = k/1
Q. The half-life of a first-order reaction is independent of the initial concentration of the reactant. What is the expression for the half-life (t1/2) of a first-order reaction? (2020)
  • A. t1/2 = 0.693/k
  • B. t1/2 = k/0.693
  • C. t1/2 = 1/k
  • D. t1/2 = k/1
Q. The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What does this imply? (2020)
  • A. Adsorption is uniform.
  • B. Adsorption is multilayered.
  • C. Adsorption is monolayered.
  • D. Adsorption is temperature dependent.
Q. The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What is the maximum coverage called? (2021)
  • A. Saturation
  • B. Monolayer
  • C. Multilayer
  • D. Equilibrium
Q. The maximum displacement of a wave from its rest position is called what? (2022)
  • A. Amplitude
  • B. Wavelength
  • C. Frequency
  • D. Period
Q. The quadratic equation x² + 4x + 4 = 0 has how many distinct roots? (2021)
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Q. The rate constant of a reaction is affected by which of the following? (2023)
  • A. Nature of the reactants
  • B. Temperature
  • C. Catalysts
  • D. All of the above
Q. The resonant frequency of an RLC circuit is given by which formula? (2022)
  • A. f = 1/(2π√(LC))
  • B. f = 2π√(LC)
  • C. f = LC
  • D. f = R/(2πL)
Q. The roots of the equation x² + 2x + k = 0 are real and distinct if k is: (2020)
  • A. < 1
  • B. ≥ 1
  • C. ≤ 1
  • D. > 1
Q. The roots of the equation x² + 4x + 4 = 0 are: (2020)
  • A. -2 and -2
  • B. 2 and 2
  • C. 0 and 4
  • D. 1 and 3
Q. The roots of the equation x² + 4x + k = 0 are 2 and -6. What is the value of k? (2021)
  • A. -12
  • B. -8
  • C. -10
  • D. -14
Q. The roots of the equation x² - 8x + k = 0 are 4 and 4. Find k. (2021)
  • A. 16
  • B. 8
  • C. 0
  • D. 4
Q. The unit of electric charge in the SI system is: (2022)
  • A. Coulomb
  • B. Ampere
  • C. Volt
  • D. Ohm
Q. The unit of energy equivalent to 1 Joule is: (2023)
  • A. 1 kg·m²/s²
  • B. 1 N·m
  • C. Both 1 kg·m²/s² and 1 N·m
  • D. None of the above
Q. The unit of energy in the CGS system is: (2020)
  • A. Joule
  • B. Erg
  • C. Calorie
  • D. Watt
Q. The unit of energy in the SI system is equivalent to which of the following? (2020)
  • A. Joule
  • B. Newton-meter
  • C. Both A and B
  • D. None of the above
Q. What are the roots of the equation 3x² - 12x + 12 = 0? (2019)
  • A. 2
  • B. 4
  • C. 0
  • D. 3
Q. What are the roots of the equation x² - 2x - 8 = 0? (2022)
  • A. -2 and 4
  • B. 2 and -4
  • C. 4 and -2
  • D. 0 and 8
Q. What are the roots of the equation x² - 5x + 6 = 0? (2021)
  • A. 1 and 6
  • B. 2 and 3
  • C. 3 and 2
  • D. 0 and 5
Q. What does the term 'enthalpy' refer to? (2020)
  • A. Internal energy plus pressure times volume
  • B. Heat content of a system at constant pressure
  • C. Total energy of a system
  • D. Work done by the system
Q. What happens to the capacitance of a parallel plate capacitor if the distance between the plates is increased? (2020)
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
Q. What happens to the entropy of an isolated system? (2020) 2020
  • A. It decreases
  • B. It remains constant
  • C. It increases
  • D. It can either increase or decrease
Q. What happens to the induced current if the magnetic field is suddenly removed from a coil? (2022)
  • A. It continues to flow
  • B. It stops immediately
  • C. It increases
  • D. It decreases gradually
Q. What happens to the magnetic field lines when a magnet is cut into two pieces? (2021)
  • A. They disappear
  • B. They become weaker
  • C. Each piece becomes a magnet with its own field
  • D. They merge into one
Q. What happens to the magnetic field strength inside a solenoid if the number of turns is increased? (2023)
  • A. It decreases
  • B. It remains the same
  • C. It increases
  • D. It becomes zero
Q. What happens to the magnetic field strength inside a solenoid if the number of turns per unit length is increased? (2023)
  • A. It decreases
  • B. It increases
  • C. It remains the same
  • D. It becomes zero
Q. What happens to the magnetic field when the current in a solenoid is reversed? (2023)
  • A. It remains the same
  • B. It disappears
  • C. It reverses direction
  • D. It doubles
Q. What happens to the magnetic field when the current in a wire is reversed? (2023)
  • A. It remains the same
  • B. It doubles
  • C. It reverses direction
  • D. It disappears
Q. What happens to the magnetic field when the distance from a long straight conductor is doubled? (2023)
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. What happens to the particles in a gas when the temperature increases? (2023)
  • A. They move slower
  • B. They move faster
  • C. They stay the same
  • D. They condense
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