Undergraduate

Q. The half-life of a first-order reaction is independent of the initial concentration of the reactant. What is the formula for the half-life (t1/2) of a first-order reaction? (2020)
  • A. t1/2 = 0.693/k
  • B. t1/2 = k/0.693
  • C. t1/2 = 1/k
  • D. t1/2 = k/1
Q. The heat capacity at constant volume (Cv) is defined as: (2022)
  • A. The amount of heat required to raise the temperature of a substance by 1°C at constant pressure.
  • B. The amount of heat required to raise the temperature of a substance by 1°C at constant volume.
  • C. The total heat content of a substance.
  • D. The heat required to change the phase of a substance.
Q. The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What is the maximum coverage called? (2021)
  • A. Saturation
  • B. Monolayer
  • C. Multilayer
  • D. Equilibrium
Q. The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What does this imply? (2020)
  • A. Adsorption is uniform.
  • B. Adsorption is multilayered.
  • C. Adsorption is monolayered.
  • D. Adsorption is temperature dependent.
Q. The magnetic field inside a long solenoid is given by which of the following expressions? (2020)
  • A. μ₀nI
  • B. μ₀I/n
  • C. nI/μ₀
  • D. I/μ₀n
Q. The magnetic field lines inside a bar magnet are directed from: (2019)
  • A. North to South
  • B. South to North
  • C. East to West
  • D. West to East
Q. The maximum displacement of a wave from its rest position is called what? (2022)
  • A. Amplitude
  • B. Wavelength
  • C. Frequency
  • D. Period
Q. The potential energy stored in a capacitor is given by which of the following formulas? (2020)
  • A. 1/2 CV^2
  • B. CV
  • C. Q^2/2C
  • D. 1/2 QV
Q. The pressure of an ideal gas is directly proportional to its temperature when: (2022)
  • A. Volume is constant
  • B. Number of moles is constant
  • C. Both volume and number of moles are constant
  • D. None of the above
Q. The rate constant of a reaction is affected by which of the following? (2023)
  • A. Nature of the reactants
  • B. Temperature
  • C. Catalysts
  • D. All of the above
Q. The restoring force in simple harmonic motion is directly proportional to what? (2022)
  • A. Displacement
  • B. Velocity
  • C. Acceleration
  • D. Mass
Q. The scientific study of classification is known as: (2022)
  • A. Taxonomy
  • B. Morphology
  • C. Anatomy
  • D. Ecology
Q. The specific heat capacity of a substance is defined as: (2023)
  • A. The amount of heat required to raise the temperature by 1 degree Celsius
  • B. The amount of heat required to change the phase of a substance
  • C. The heat required to raise the temperature of 1 kg of the substance by 1 degree Celsius
  • D. The heat required to raise the temperature of 1 mole of the substance by 1 degree Celsius
Q. The uncertainty in a measurement is defined as: (2022)
  • A. The difference between the maximum and minimum values
  • B. The average of the measurements
  • C. The standard deviation
  • D. The range of values
Q. The unit of force in the SI system is derived from which of the following? (2023)
  • A. Mass and length
  • B. Mass, length, and time
  • C. Length and time
  • D. Mass and time
Q. The unit of work is defined as one joule. What is one joule equivalent to? (2023)
  • A. One newton meter
  • B. One kilogram meter per second
  • C. One watt second
  • D. One pascal meter
Q. The viscosity of a fluid is a measure of its: (2022)
  • A. Density
  • B. Pressure
  • C. Resistance to flow
  • D. Temperature
Q. Two capacitors of capacitance 2μF and 3μF are connected in series. What is the equivalent capacitance? (2019)
  • A. 1.2μF
  • B. 1.5μF
  • C. 0.86μF
  • D. 5μF
Q. Viruses are classified as: (2020)
  • A. Living organisms
  • B. Non-living entities
  • C. Prokaryotes
  • D. Eukaryotes
Q. What are the roots of the equation 3x² - 12x + 12 = 0? (2019)
  • A. 2
  • B. 4
  • C. 0
  • D. 3
Q. What are the roots of the equation x² - 5x + 6 = 0? (2021)
  • A. 1 and 6
  • B. 2 and 3
  • C. 3 and 2
  • D. 0 and 5
Q. What does the term 'enthalpy' refer to? (2020)
  • A. Internal energy plus pressure times volume
  • B. Heat content of a system at constant pressure
  • C. Total energy of a system
  • D. Work done by the system
Q. What happens to the capacitance of a capacitor if a dielectric material is introduced between its plates? (2021)
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. What happens to the current in a circuit if the voltage is increased while the resistance remains constant? (2021)
  • A. The current decreases
  • B. The current increases
  • C. The current remains the same
  • D. The current becomes zero
Q. What happens to the density of a material when it is compressed? (2019)
  • A. It decreases
  • B. It increases
  • C. It remains the same
  • D. It becomes zero
Q. What happens to the entropy of an isolated system? (2020) 2020
  • A. It decreases
  • B. It remains constant
  • C. It increases
  • D. It can either increase or decrease
Q. What happens to the equilibrium position when a catalyst is added to a reaction at equilibrium? (2023)
  • A. Shifts to the right
  • B. Shifts to the left
  • C. No change
  • D. Increases Kc
Q. What happens to the image distance when the object is moved closer to a concave mirror? (2021)
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes negative
Q. What happens to the magnetic field when the current in a solenoid is reversed? (2023)
  • A. It remains the same
  • B. It disappears
  • C. It reverses direction
  • D. It doubles
Q. What happens to the magnetic field when the distance from a long straight conductor is doubled? (2023)
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
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