Which reaction produces polymer? A. Hydrolysis B. Polymerization C. Oxidation D. Reduction Explanation: Polymerization links monomers.
Which reagent oxidizes alcohol to aldehyde? A. KMnO₄ B. PCC C. NaOH D. HCl Explanation: PCC stops oxidation at aldehyde stage.
Which species has highest oxidation state? A. MnO₂ B. Mn₂O₇ C. MnO D. Mn₃O₄ Explanation: Mn in Mn₂O₇ is +7.
Which acid is strongest in water? A. HF B. HClO₄ C. H₂CO₃ D. CH₃COOH Explanation: Perchloric acid fully dissociates.
Which state of matter has long-range order but flows? A. Solid B. Liquid crystal C. Gas D. Plasma Explanation: Liquid crystals combine order and fluidity.
Which phenomenon proves quantization of charge? A. Photoelectric effect B. Millikan oil drop experiment C. Compton scattering D. Interference Explanation: Oil drop experiment measured discrete electron charge.
Which thermodynamic quantity remains constant in adiabatic process? A. Temperature B. Pressure C. Entropy (reversible case) D. Volume Explanation: Reversible adiabatic process is isentropic.
Which particle experiences all four fundamental forces? A. Electron B. Proton C. Neutrino D. Photon Explanation: Proton interacts via strong, weak, EM, and gravity.
Which law governs blackbody radiation spectrum? A. Newton’s law B. Planck’s law C. Boyle’s law D. Hooke’s law Explanation: Planck’s law describes spectral energy distribution.