Engineering Entrance

Q. What is the common oxidation state of nitrogen in ammonia (NH3)? (2023) 2023
  • A. -3
  • B. 0
  • C. +1
  • D. +3
Q. What is the concentration in mol/L of a solution made by dissolving 58.5 grams of NaCl in 1 liter of water? (Molar mass of NaCl = 58.5 g/mol) (2023) 2023
  • A. 1 M
  • B. 0.5 M
  • C. 2 M
  • D. 0.25 M
Q. What is the concentration of a solution if 5 g of NaOH is dissolved in 250 mL of water? (2020)
  • A. 0.5 M
  • B. 1 M
  • C. 0.2 M
  • D. 0.1 M
Q. What is the concentration of H+ ions in a solution with pH 3? (2019) 2019
  • A. 0.001 M
  • B. 0.01 M
  • C. 0.1 M
  • D. 1 M
Q. What is the concentration of H+ ions in a solution with pH 4?
  • A. 0.0001 M
  • B. 0.01 M
  • C. 0.1 M
  • D. 1 M
Q. What is the coordinates of the centroid of the triangle with vertices (0, 0), (6, 0), and (3, 6)? (2022)
  • A. (3, 2)
  • B. (2, 3)
  • C. (3, 3)
  • D. (4, 2)
Q. What is the coordination number of the central metal ion in the complex ion [Co(NH3)6]Cl3? (2021)
  • A. 2
  • B. 4
  • C. 6
  • D. 8
Q. What is the coordination number of the complex ion [Co(NH3)5Cl]Cl2? (2023)
  • A. 4
  • B. 5
  • C. 6
  • D. 3
Q. What is the coordination number of the complex ion [Co(NH3)6]Cl3? (2022) 2022
  • A. 4
  • B. 6
  • C. 2
  • D. 8
Q. What is the cross product of vectors A = i + j and B = j + k? (2022)
  • A. i + k
  • B. i - k
  • C. j - i
  • D. k - j
Q. What is the current through a 10Ω resistor connected to a 20V battery? (2020)
  • A. 1A
  • B. 2A
  • C. 3A
  • D. 4A
Q. What is the current through a 12Ω resistor connected to a 24V battery? (2023)
  • A. 1A
  • B. 2A
  • C. 3A
  • D. 4A
Q. What is the current through a 12Ω resistor when a voltage of 48V is applied? (2023)
  • A. 4A
  • B. 6A
  • C. 3A
  • D. 2A
Q. What is the derivative of f(x) = 1/x?
  • A. -1/x^2
  • B. 1/x^2
  • C. -x
  • D. x
Q. What is the derivative of f(x) = 3x^2 + 5x - 7? (2021) 2021
  • A. 3x + 5
  • B. 6x + 5
  • C. 6x - 5
  • D. 3x^2 + 5
Q. What is the derivative of f(x) = 5x^4?
  • A. 20x^3
  • B. 5x^3
  • C. 15x^3
  • D. 4x^3
Q. What is the derivative of f(x) = e^(2x)?
  • A. 2e^(2x)
  • B. e^(2x)
  • C. e^(x)
  • D. 2x*e^(2x)
Q. What is the derivative of f(x) = x^3 - 4x + 6?
  • A. 3x^2 - 4
  • B. 3x^2 + 4
  • C. x^2 - 4
  • D. 3x^2 - 6
Q. What is the derivative of f(x) = x^3 - 4x?
  • A. 3x^2 - 4
  • B. 3x^2 + 4
  • C. x^2 - 4
  • D. 3x^2 - 2
Q. What is the derivative of f(x) = x^4 + 2x^3 - x + 1? (2017)
  • A. 4x^3 + 6x^2 - 1
  • B. 4x^3 + 2x^2 - 1
  • C. 3x^3 + 6x^2 - 1
  • D. 4x^3 + 2x - 1
Q. What is the determinant of G = [[1, 1, 1], [1, 2, 3], [1, 3, 6]]? (2023)
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Q. What is the determinant of G = [[1, 2], [2, 4]]? (2020)
  • A. 0
  • B. 1
  • C. 2
  • D. 4
Q. What is the determinant of G = [[2, 2], [2, 2]]? (2020)
  • A. 0
  • B. 4
  • C. 2
  • D. 1
Q. What is the determinant of H = [[3, 1], [2, 4]]? (2023)
  • A. 10
  • B. 11
  • C. 12
  • D. 13
Q. What is the determinant of the identity matrix I = [[1, 0], [0, 1]]? (2021)
  • A. 0
  • B. 1
  • C. -1
  • D. 2
Q. What is the determinant of the matrix E = [[1, 2, 3], [0, 1, 4], [5, 6, 0]]? (2021)
  • A. -14
  • B. 14
  • C. 0
  • D. 10
Q. What is the determinant of the matrix \( A = \begin{pmatrix} 1 & 2 \\ 3 & 4 \end{pmatrix} \)? (2021)
  • A. -2
  • B. 2
  • C. 0
  • D. 4
Q. What is the determinant of the matrix \( F = \begin{pmatrix} 1 & 2 & 3 \\ 0 & 1 & 4 \\ 5 & 6 & 0 \end{pmatrix} \)? (2022)
  • A. -14
  • B. 14
  • C. 0
  • D. 6
Q. What is the determinant of the matrix \( G = \begin{pmatrix} 2 & 3 \\ 5 & 7 \end{pmatrix} \)? (2023)
  • A. 1
  • B. 4
  • C. 7
  • D. 11
Q. What is the determinant of the matrix \( I = \begin{pmatrix} 4 & 2 \\ 1 & 3 \end{pmatrix} \)? (2021)
  • A. 10
  • B. 8
  • C. 6
  • D. 12
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