Selected MCQ

Current Question
Which hybridization is present in benzene carbon?
  • A. sp
  • B. sp²
  • C. sp³
  • D. dsp²
Correct Answer: B
Explanation:
Benzene carbons are trigonal planar.
Related Question 1
In general relativity, geodesics represent:
  • A. Maximum energy paths
  • B. Straightest paths in curved spacetime
  • C. Quantum trajectories
  • D. Stationary points of entropy
Correct Answer: B
Explanation:
Free-falling particles follow spacetime geodesics.
Related Question 2
In a Hilbert space formulation of quantum mechanics, physical states are represented by:
  • A. Real numbers
  • B. Vectors up to a global phase
  • C. Scalars only
  • D. Matrices only
Correct Answer: B
Explanation:
States are rays in Hilbert space, invariant under global phase.
Related Question 3
In plasma physics, Debye length represents:
  • A. Particle velocity
  • B. Screening distance of electric fields
  • C. Temperature gradient
  • D. Magnetic field strength
Correct Answer: B
Explanation:
Debye length defines electrostatic screening scale.
Related Question 4
Which hybridization is linear?
  • A. sp
  • B. sp²
  • C. sp³
  • D. dsp²
Correct Answer: A
Explanation:
sp gives 180° geometry.
Related Question 5
Which cycle involves carbon dioxide?
  • A. Nitrogen
  • B. Carbon
  • C. Water
  • D. Rock
Correct Answer: B
Explanation:
CO₂ circulates in carbon cycle.