Defence Exams

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Q. What is the effect of deforestation on river soil quality?
  • A. Improves soil quality
  • B. No effect
  • C. Decreases soil quality
  • D. Increases soil moisture
Q. What is the electron configuration of a chlorine atom (atomic number 17)? (2020)
  • A. 1s² 2s² 2p⁶ 3s² 3p⁵
  • B. 1s² 2s² 2p⁶ 3s² 3p⁶
  • C. 1s² 2s² 2p⁶ 3s² 3p⁴
  • D. 1s² 2s² 2p⁶ 3s² 3d⁵
Q. What is the electron configuration of a neutral carbon atom? (2022)
  • A. 1s² 2s² 2p²
  • B. 1s² 2s² 2p⁶
  • C. 1s² 2s² 2p⁴
  • D. 1s² 2s² 2p³
Q. What is the electron configuration of an oxygen atom? (2021)
  • A. 1s² 2s² 2p⁴
  • B. 1s² 2s² 2p²
  • C. 1s² 2s² 2p⁶
  • D. 1s² 2s² 2p³
Q. What is the empirical formula of a compound with a molecular formula C6H12? (2021)
  • A. CH
  • B. C2H4
  • C. C3H6
  • D. C6H12
Q. What is the empirical formula of a compound with the molecular formula C6H12? (2021)
  • A. CH
  • B. C2H4
  • C. C3H6
  • D. C6H12
Q. What is the energy of a photon with a frequency of 5 x 10^14 Hz? (Planck's constant h = 6.626 x 10^-34 J·s) (2021)
  • A. 3.31 x 10^-19 J
  • B. 1.32 x 10^-19 J
  • C. 2.48 x 10^-19 J
  • D. 4.97 x 10^-19 J
Q. What is the equation of a circle with center at (2, -3) and radius 4? (2022)
  • A. (x-2)² + (y+3)² = 16
  • B. (x+2)² + (y-3)² = 16
  • C. (x-2)² + (y-3)² = 16
  • D. (x+2)² + (y+3)² = 16
Q. What is the equation of a circle with center at (3, -2) and radius 4? (2023)
  • A. (x-3)² + (y+2)² = 16
  • B. (x+3)² + (y-2)² = 16
  • C. (x-3)² + (y-2)² = 16
  • D. (x+3)² + (y+2)² = 16
Q. What is the equation of a circle with center at (3, -2) and radius 5? (2022)
  • A. (x-3)² + (y+2)² = 25
  • B. (x+3)² + (y-2)² = 25
  • C. (x-3)² + (y-2)² = 25
  • D. (x+3)² + (y+2)² = 25
Q. What is the equation of the circle with center at (2, -3) and radius 5?
  • A. (x-2)² + (y+3)² = 25
  • B. (x+2)² + (y-3)² = 25
  • C. (x-2)² + (y-3)² = 25
  • D. (x+2)² + (y+3)² = 25
Q. What is the equation of the directrix of the parabola x^2 = 12y?
  • A. y = 3
  • B. y = -3
  • C. y = 6
  • D. y = -6
Q. What is the equation of the line parallel to y = 3x + 2 that passes through the point (4, 1)? (2020)
  • A. y = 3x - 11
  • B. y = 3x + 1
  • C. y = 3x + 2
  • D. y = 3x - 2
Q. What is the equation of the line parallel to y = 3x + 4 that passes through the point (1, 2)? (2020)
  • A. y = 3x - 1
  • B. y = 3x + 1
  • C. y = 3x + 2
  • D. y = 3x - 2
Q. What is the equation of the line parallel to y = 3x - 4 that passes through the point (2, 1)? (2020)
  • A. y = 3x - 5
  • B. y = 3x + 1
  • C. y = 3x - 1
  • D. y = 3x + 4
Q. What is the equation of the line that is perpendicular to y = 3x + 2 and passes through the point (1, 1)? (2022)
  • A. y = -1/3x + 4/3
  • B. y = 3x - 2
  • C. y = -3x + 4
  • D. y = 1/3x + 2/3
Q. What is the equation of the line that is perpendicular to y = 3x + 4 and passes through the point (1, 1)? (2022)
  • A. y - 1 = -1/3(x - 1)
  • B. y - 1 = 3(x - 1)
  • C. y - 1 = 3/1(x - 1)
  • D. y - 1 = -3(x - 1)
Q. What is the equation of the line that passes through the origin and has a slope of -3? (2022)
  • A. y = -3x
  • B. y = 3x
  • C. y = -x/3
  • D. y = 1/3x
Q. What is the equation of the line that passes through the origin and has a slope of -4? (2023)
  • A. y = -4x
  • B. y = 4x
  • C. y = -x/4
  • D. y = 1/4x
Q. What is the equivalent resistance of two resistors of 4 ohms and 6 ohms connected in series?
  • A. 10 ohms
  • B. 24 ohms
  • C. 2.4 ohms
  • D. 0.67 ohms
Q. What is the equivalent resistance of two resistors of 4 ohms and 6 ohms in series?
  • A. 10 ohms
  • B. 24 ohms
  • C. 2.4 ohms
  • D. 0.67 ohms
Q. What is the equivalent resistance of two resistors, R1 = 4Ω and R2 = 6Ω, in parallel? (2022)
  • A. 2.4Ω
  • B. 10Ω
  • C. 24Ω
  • D. 1.5Ω
Q. What is the equivalent resistance of two resistors, R1 and R2, in parallel? (2022)
  • A. R1 + R2
  • B. R1 * R2 / (R1 + R2)
  • C. 1 / (1/R1 + 1/R2)
  • D. R1 - R2
Q. What is the estimated temperature at the Earth's inner core?
  • A. 4000°C
  • B. 5000°C
  • C. 6000°C
  • D. 7000°C
Q. What is the expansion of (2x - 3)²? (2022)
  • A. 4x² - 9
  • B. 4x² - 12x + 9
  • C. 4x² + 12x + 9
  • D. 4x² - 6x
Q. What is the expansion of (2x - 3y)²?
  • A. 4x² - 9y²
  • B. 4x² - 12xy + 9y²
  • C. 4x² + 9y²
  • D. 4x² + 12xy + 9y²
Q. What is the expansion of (x + 2)(x - 2)?
  • A. x² - 4
  • B. x² + 4
  • C. 2x² - 4
  • D. x² - 2
Q. What is the first derivative of f(x) = ln(x)? (2019)
  • A. 1/x
  • B. x
  • C. ln(x)
  • D. e^x
Q. What is the first derivative of f(x) = tan(x)? (2021)
  • A. sec^2(x)
  • B. cos^2(x)
  • C. sin^2(x)
  • D. csc^2(x)
Q. What is the focal length of a diverging lens if the image distance is -15 cm and the object distance is -10 cm? (2023)
  • A. -30 cm
  • B. -20 cm
  • C. -15 cm
  • D. -10 cm
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