Which vitamin is fat soluble? A. Vitamin C B. Vitamin B C. Vitamin D D. Vitamin B12 Explanation: Vitamin D dissolves in fat.
Which biomolecule stores energy long term? A. Protein B. Lipid C. Carbohydrate D. Nucleic acid Explanation: Lipids store long-term energy.
Which part of atom contains protons? A. Orbit B. Shell C. Nucleus D. Cloud Explanation: Protons reside in nucleus.
Which process releases energy? A. Endothermic B. Exothermic C. Neutral D. Isothermal Explanation: Exothermic reactions release heat.
Which gas law relates volume and temperature? A. Boyle B. Charles C. Dalton D. Avogadro Explanation: Volume proportional to temperature.
Which bond involves electron transfer? A. Covalent B. Ionic C. Metallic D. Hydrogen Explanation: Ionic bonds involve transfer of electrons.
Which system has highest internal energy? A. Solid B. Liquid C. Gas D. Vacuum Explanation: Gas particles have highest kinetic energy.
Which process is reversible? A. Friction B. Heat loss C. Ideal isothermal expansion D. Combustion Explanation: Ideal reversible processes are quasi-static.
Which material is semiconductor? A. Copper B. Silicon C. Rubber D. Glass Explanation: Silicon has intermediate conductivity.
Which wave property determines pitch? A. Amplitude B. Frequency C. Speed D. Phase Explanation: Pitch depends on frequency.