Major Competitive Exams

Q. The displacement of a simple harmonic oscillator is given by x(t) = A cos(ωt + φ). What is the maximum displacement?
  • A. A
  • B. ω
  • C. φ
  • D. 0
Q. The distance from the point (3, 4) to the line 2x + 3y - 6 = 0 is:
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. The eccentricity of an ellipse is defined as e = c/a. If a = 10 and c = 6, what is the eccentricity?
  • A. 0.6
  • B. 0.8
  • C. 0.4
  • D. 0.5
Q. The energy of a simple harmonic oscillator is proportional to which of the following?
  • A. Displacement
  • B. Velocity
  • C. Square of amplitude
  • D. Frequency
Q. The enthalpy change for a reaction can be calculated using which of the following?
  • A. Bond energies
  • B. Standard enthalpies of formation
  • C. Calorimetry
  • D. All of the above
Q. The enthalpy change for the reaction A + B → C is +50 kJ/mol. What can be said about the reaction?
  • A. It is exothermic
  • B. It is endothermic
  • C. It is spontaneous
  • D. It is at equilibrium
Q. The enthalpy of vaporization of a substance is defined as:
  • A. The heat required to melt the substance
  • B. The heat required to convert a liquid into a gas
  • C. The heat released during condensation
  • D. The heat required to raise the temperature of a substance
Q. The enthalpy of vaporization of water is approximately ____ kJ/mol.
  • A. 40.79
  • B. 60.79
  • C. 80.79
  • D. 100.79
Q. The enthalpy of vaporization of water is approximately:
  • A. 40.79 kJ/mol
  • B. 2260 kJ/mol
  • C. 100 kJ/mol
  • D. 60 kJ/mol
Q. The entropy change for a phase transition at constant temperature is given by:
  • A. ΔS = ΔH/T
  • B. ΔS = T/ΔH
  • C. ΔS = ΔH*T
  • D. ΔS = ΔH + T
Q. The entropy change for a reaction can be calculated using which of the following?
  • A. ΔS = ΣS(products) - ΣS(reactants)
  • B. ΔS = ΣS(reactants) - ΣS(products)
  • C. ΔS = Q/T
  • D. ΔS = W/T
Q. The entropy of a perfect crystal at absolute zero is given by:
  • A. R
  • B. 0
  • C.
  • D. 1
Q. The entropy of a perfect crystal at absolute zero is:
  • A. Maximum
  • B. Minimum
  • C. Undefined
  • D. Infinite
Q. The entropy of a perfect crystal at absolute zero temperature is given by which law?
  • A. Third law of thermodynamics
  • B. First law of thermodynamics
  • C. Second law of thermodynamics
  • D. Zeroth law of thermodynamics
Q. The entropy of a perfect crystal at absolute zero temperature is given by:
  • A. 0
  • B. 1
  • C. Infinity
  • D. Depends on the substance
Q. The entropy of a perfect crystalline substance at absolute zero is given by which law?
  • A. Third law of thermodynamics
  • B. First law of thermodynamics
  • C. Second law of thermodynamics
  • D. Zeroth law of thermodynamics
Q. The entropy of a perfect crystalline substance at absolute zero is:
  • A. Zero
  • B. Maximum
  • C. Undefined
  • D. Infinite
Q. The equation of a line parallel to y = 2x + 3 and passing through (1, 1) is?
  • A. y = 2x - 1
  • B. y = 2x + 1
  • C. y = 2x + 3
  • D. y = 2x - 3
Q. The equation of a line passing through (1, 2) and (3, 6) is:
  • A. y = 2x
  • B. y = 3x - 1
  • C. y = x + 1
  • D. y = 4x - 2
Q. The equation of a parabola is given by x^2 = 16y. What is the length of the latus rectum?
  • A. 4
  • B. 8
  • C. 16
  • D. 32
Q. The equation of an ellipse is given by 4x^2 + 9y^2 = 36. What is the eccentricity of the ellipse?
  • A. 0.5
  • B. 0.6
  • C. 0.7
  • D. 0.8
Q. The equation of motion for a simple harmonic oscillator is given by x(t) = A cos(ωt + φ). What does A represent?
  • A. Angular frequency
  • B. Phase constant
  • C. Amplitude
  • D. Displacement
Q. The equation of the line passing through (1, 2) and (3, 6) is:
  • A. y = 2x
  • B. y = 3x - 1
  • C. y = x + 1
  • D. y = 4x - 2
Q. The equation of the line passing through the points (1, 2) and (3, 6) is:
  • A. y = 2x
  • B. y = 3x - 1
  • C. y = 4x - 2
  • D. y = x + 1
Q. The equation of the pair of lines through the origin is given by y = mx. If m1 and m2 are the slopes, what is the condition for them to be perpendicular?
  • A. m1 + m2 = 0
  • B. m1 * m2 = 1
  • C. m1 - m2 = 0
  • D. m1 * m2 = -1
Q. The equation of the pair of lines through the origin with slopes m1 and m2 is given by:
  • A. y = mx
  • B. y^2 = mx
  • C. x^2 + y^2 = 0
  • D. x^2 - 2mxy + y^2 = 0
Q. The equation of the pair of lines through the origin with slopes m1 and m2 is:
  • A. y = m1x + m2x
  • B. y = (m1 + m2)x
  • C. y = m1x - m2x
  • D. y = m1x * m2x
Q. The equation of the tangent to the curve y = x^2 at the point (2, 4) is:
  • A. y = 2x - 4
  • B. y = 2x
  • C. y = x + 2
  • D. y = x^2 - 2
Q. The equation x^2 + 2x + 1 = 0 can be factored as:
  • A. (x + 1)(x + 1)
  • B. (x - 1)(x - 1)
  • C. (x + 2)(x + 1)
  • D. (x - 2)(x - 1)
Q. The equation x^2 + 4x + 4 = 0 has:
  • A. Two distinct roots
  • B. One repeated root
  • C. No real roots
  • D. None of these
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