Major Competitive Exams

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Q. If the emf of a cell is 12 V and the potentiometer wire is 20 m long, what is the potential gradient if the wire is calibrated to give a reading of 0.6 V/m?
  • A. 12 V
  • B. 0.6 V/m
  • C. 0.3 V/m
  • D. 0.5 V/m
Q. If the emf of a cell is 2V and the potential gradient of the potentiometer wire is 4 V/m, what will be the balancing length?
  • A. 0.5 m
  • B. 1 m
  • C. 0.25 m
  • D. 0.75 m
Q. If the enthalpy of a system increases, the process is considered _____.
  • A. exothermic
  • B. endothermic
  • C. isothermal
  • D. adiabatic
Q. If the enthalpy of a system increases, what can be inferred about the system?
  • A. It is losing heat
  • B. It is gaining heat
  • C. It is at equilibrium
  • D. It is undergoing a phase change
Q. If the enthalpy of reaction is -100 kJ, what can be said about the reaction?
  • A. It absorbs heat
  • B. It releases heat
  • C. It is at equilibrium
  • D. It requires energy input
Q. If the entropy of a system increases, what can be inferred about the spontaneity of the process?
  • A. The process is non-spontaneous
  • B. The process is spontaneous
  • C. The process is at equilibrium
  • D. None of the above
Q. If the entropy of a system increases, what is the effect on Gibbs Free Energy at constant temperature?
  • A. ΔG increases
  • B. ΔG decreases
  • C. ΔG remains constant
  • D. ΔG becomes zero
Q. If the equation 2x + 3 = 11 is solved for x, what is the value of x?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. If the equation 2x + 3y = 6 is transformed into slope-intercept form, what is the slope of the line?
  • A. -2
  • B. 2
  • C. -3/2
  • D. 3/2
Q. If the equation 2x^2 + 3x + k = 0 has one root equal to 1, what is the value of k?
  • A. -1
  • B. 0
  • C. 1
  • D. 2
Q. If the equation 2x^2 + 3x + k = 0 has roots 1 and -2, what is the value of k?
  • A. -4
  • B. 0
  • C. 2
  • D. 4
Q. If the equation 2x^2 + 3x - 5 = 0 has roots r1 and r2, what is the value of r1 + r2?
  • A. -3/2
  • B. 3/2
  • C. 5/2
  • D. -5/2
Q. If the equation of a line is given as 2x - 3y + 6 = 0, what is the y-intercept of the line?
  • A. -2
  • B. 2
  • C. 3
  • D. 0
Q. If the equation of a line is given as y = mx + b, what does 'm' represent?
  • A. The y-intercept
  • B. The x-intercept
  • C. The slope of the line
  • D. The constant term
Q. If the equation of a line is y = -1/2x + 3, what is the x-intercept?
  • A. 6
  • B. 3
  • C. 0
  • D. 1
Q. If the equation of a line is y = -1/2x + 3, what is the y-value when x = 4?
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. If the equation of a line is y = mx + c, what does 'm' represent?
  • A. The y-intercept
  • B. The slope
  • C. The x-intercept
  • D. The distance
Q. If the equation of a parabola is given by y^2 = 12x, what is the value of 'p'?
  • A. 3
  • B. 6
  • C. 4
  • D. 12
Q. If the equation of an ellipse is 9x^2 + 16y^2 = 144, what are the lengths of the semi-major and semi-minor axes?
  • A. 3, 4
  • B. 4, 3
  • C. 6, 8
  • D. 8, 6
Q. If the equation x^2 + px + q = 0 has roots 2 and 3, what is the value of p?
  • A. -5
  • B. -6
  • C. -7
  • D. -8
Q. If the equation x^2 - 5x + k = 0 has equal roots, what is the value of k?
  • A. 5
  • B. 6
  • C. 7
  • D. 8
Q. If the equilibrium constant Kc for a reaction is 10 at a certain temperature, what is the value of Kc for the reverse reaction?
  • A. 0.1
  • B. 1
  • C. 10
  • D. 100
Q. If the equilibrium constant Kc for a reaction is 10, what can be said about the position of equilibrium?
  • A. Products are favored
  • B. Reactants are favored
  • C. Equilibrium is at the center
  • D. No conclusion can be drawn
Q. If the equilibrium constant Kc for a reaction is 10, what is the value of Kc for the reverse reaction? (2020)
  • A. 0.1
  • B. 10
  • C. 1
  • D. 100
Q. If the equilibrium constant Kc for a reaction is less than 1, what does it indicate about the equilibrium position?
  • A. Products are favored
  • B. Reactants are favored
  • C. Equal amounts of reactants and products
  • D. Reaction does not occur
Q. If the expansion of (x + a)^n has a term 15x^3a^2, what is the value of n?
  • A. 5
  • B. 6
  • C. 7
  • D. 8
Q. If the expansion of (x + y)^n contains a term with x^4y^2, what can be inferred about the value of n?
  • A. n must be 6.
  • B. n must be greater than 6.
  • C. n must be less than 6.
  • D. n can be any integer.
Q. If the expansion of (x + y)^n contains a term with x^4y^3, what can be inferred about n?
  • A. n must be 7.
  • B. n must be greater than 7.
  • C. n must be less than 7.
  • D. n can be any integer.
Q. If the exterior angle of a regular polygon is 30 degrees, how many sides does it have?
  • A. 6
  • B. 12
  • C. 10
  • D. 8
Q. If the family of curves is given by y = k/x, what type of curves does it represent?
  • A. Linear
  • B. Hyperbolic
  • C. Circular
  • D. Exponential
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