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MCQ Practice

General Science (Everyday Science) MCQs

Which particle mediates electromagnetic force?

  • A. Gluon
  • B. Photon
  • C. W boson
  • D. Higgs
Explanation:
Photons are force carriers of EM interaction.

Which process causes plate movement?

  • A. Radiation
  • B. Mantle convection
  • C. Erosion
  • D. Deposition
Explanation:
Heat-driven convection moves plates.

Which base pairs with adenine in DNA?

  • A. Cytosine
  • B. Guanine
  • C. Thymine
  • D. Uracil
Explanation:
A pairs with T in DNA.

Which factor increases reaction rate?

  • A. Lower temperature
  • B. Higher activation energy
  • C. Catalyst
  • D. Decreasing concentration
Explanation:
Catalyst lowers activation energy.

Which equation describes wave speed?

  • A. (v = f\lambda)
  • B. (v = at)
  • C. (v = u + at)
  • D. (v = s/t)
Explanation:
Wave speed equals frequency times wavelength.

Which rock type forms from cooling magma?

  • A. Sedimentary
  • B. Metamorphic
  • C. Igneous
  • D. Clastic
Explanation:
Igneous rocks form from molten material.

Which process generates ATP in mitochondria?

  • A. Glycolysis
  • B. Krebs cycle
  • C. Oxidative phosphorylation
  • D. Fermentation
Explanation:
Electron transport chain drives ATP synthesis.

Which has highest lattice energy?

  • A. NaCl
  • B. MgO
  • C. KBr
  • D. CaCl₂
Explanation:
Higher charge ions yield stronger attraction.

Which frame is non-inertial?

  • A. Constant velocity frame
  • B. Rotating frame
  • C. Free-fall frame
  • D. Spacecraft coasting
Explanation:
Rotating frames experience fictitious forces.

Which process removes CO₂ from atmosphere long-term?

  • A. Photosynthesis
  • B. Respiration
  • C. Ocean dissolution
  • D. Silicate weathering
Explanation:
Weathering locks carbon in rocks.