JEE Main

Q. In which process does the entropy of the system decrease?
  • A. Freezing of water
  • B. Evaporation of water
  • C. Sublimation of dry ice
  • D. Dissolving salt in water
Q. In which scenario would the frictional force be at its maximum?
  • A. When an object is at rest
  • B. When an object is sliding
  • C. When an object is rolling
  • D. When an object is in free fall
Q. In which scenario would the Gibbs Free Energy of a system be at its minimum?
  • A. At equilibrium
  • B. At the start of a reaction
  • C. At maximum temperature
  • D. At maximum pressure
Q. In which scenario would total internal reflection NOT occur?
  • A. Light traveling from glass to air at a steep angle.
  • B. Light traveling from water to air at a shallow angle.
  • C. Light traveling from diamond to air at a high angle.
  • D. Light traveling from air to water at any angle.
Q. In which scenario would ΔG = 0?
  • A. At the start of a reaction.
  • B. At equilibrium.
  • C. When the reaction is spontaneous.
  • D. When the reaction is non-spontaneous.
Q. In which scenario would ΔG be equal to ΔH?
  • A. At absolute zero.
  • B. When ΔS = 0.
  • C. For a spontaneous reaction.
  • D. For an endothermic reaction.
Q. In which scenario would ΔG be zero?
  • A. At standard conditions
  • B. At equilibrium
  • C. In a spontaneous reaction
  • D. In a non-spontaneous reaction
Q. In which state of matter do particles have the highest kinetic energy?
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. Plasma
Q. In which type of reaction is the change in enthalpy equal to the heat absorbed or released at constant pressure?
  • A. Endothermic reaction
  • B. Exothermic reaction
  • C. Isothermal reaction
  • D. Adiabatic reaction
Q. In Young's double-slit experiment, if the distance between the slits is 0.2 mm and the distance to the screen is 1 m, what is the fringe width if the wavelength of light used is 500 nm?
  • A. 0.1 mm
  • B. 0.2 mm
  • C. 0.5 mm
  • D. 0.8 mm
Q. In Young's double-slit experiment, if the distance between the slits is 0.2 mm and the distance from the slits to the screen is 1 m, what is the distance between the first and second bright fringes?
  • A. 0.1 mm
  • B. 0.2 mm
  • C. 0.4 mm
  • D. 0.6 mm
Q. In Young's double-slit experiment, if the distance between the slits is doubled while keeping the wavelength constant, what happens to the fringe width?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In Young's double-slit experiment, if the distance between the slits is doubled, what happens to the fringe width?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. Is the function f(x) = x^2 - 2x + 1 differentiable at x = 1?
  • A. Yes
  • B. No
  • C. Only from the left
  • D. Only from the right
Q. Is the function f(x) = x^2 - 4x + 4 differentiable at x = 2?
  • A. Yes
  • B. No
  • C. Only from the left
  • D. Only from the right
Q. Is the function f(x) = x^2 sin(1/x) differentiable at x = 0?
  • A. Yes
  • B. No
  • C. Only from the left
  • D. Only from the right
Q. Is the function f(x) = x^3 - 3x + 2 differentiable at x = 1?
  • A. Yes
  • B. No
  • C. Only left differentiable
  • D. Only right differentiable
Q. Is the function f(x) = { e^x, x < 0; ln(x + 1), x >= 0 } continuous at x = 0?
  • A. Yes
  • B. No
  • C. Only left continuous
  • D. Only right continuous
Q. Is the function f(x) = { sin(x), x < 0; x^2, x >= 0 } continuous at x = 0?
  • A. Yes
  • B. No
  • C. Depends on x
  • D. Not defined
Q. Is the function f(x) = { x^3, x < 1; 2x + 1, x >= 1 } continuous at x = 1?
  • A. Yes
  • B. No
  • C. Only left continuous
  • D. Only right continuous
Q. Is the function f(x) = |x|/x continuous at x = 0?
  • A. Yes
  • B. No
  • C. Depends on direction
  • D. None of the above
Q. Lenz's law states that the direction of induced current is such that it opposes what?
  • A. The change in magnetic flux
  • B. The flow of electric current
  • C. The resistance in the circuit
  • D. The applied voltage
Q. Let A = {1, 2, 3, 4} and R be the relation defined by R = {(a, b) | a < b}. How many ordered pairs are in R?
  • A. 4
  • B. 6
  • C. 8
  • D. 10
Q. Let A = {1, 2, 3, 4} and R be the relation defined by R = {(x, y) | x < y}. How many ordered pairs are in R?
  • A. 4
  • B. 6
  • C. 8
  • D. 10
Q. Let R be a relation on the set of natural numbers defined by R = {(m, n) | m divides n}. Is R a partial order?
  • A. Yes
  • B. No
  • C. Only reflexive
  • D. Only transitive
Q. Solve for x: 2x^2 - 8x + 6 = 0.
  • A. 1
  • B. 3
  • C. 2
  • D. 4
Q. Solve for x: 3(x - 1) = 2(x + 4).
  • A. -10
  • B. 10
  • C. 2
  • D. 3
Q. Solve for x: 3(x - 2) = 12.
  • A. 2
  • B. 4
  • C. 6
  • D. 8
Q. Solve for x: 3(x - 2) = 2(x + 1).
  • A. -1
  • B. 0
  • C. 1
  • D. 2
Q. Solve for x: 5x + 2 = 3x + 10.
  • A. 4
  • B. 3
  • C. 2
  • D. 1
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