Which organ produces urine? A. Kidney B. Bladder C. Liver D. Lung Explanation: Kidneys produce urine.
Which bond involves delocalized electrons? A. Ionic B. Covalent C. Metallic D. Hydrogen Explanation: Metallic bonding has electron sea.
Which process converts liquid to gas? A. Condensation B. Evaporation C. Freezing D. Deposition Explanation: Evaporation changes liquid to vapor.
Which metal is corrosion resistant? A. Iron B. Aluminum C. Copper D. Zinc Explanation: Aluminum forms protective oxide.
Which wave shows polarization? A. Sound B. Light C. Water D. Seismic Explanation: Only transverse waves polarize.
Which device measures electric power? A. Voltmeter B. Ammeter C. Wattmeter D. Ohmmeter Explanation: Wattmeter measures power.
Which unit measures frequency? A. Joule B. Watt C. Hertz D. Pascal Explanation: Hertz = cycles per second.
Which force holds nucleus together? A. Gravitational B. Strong nuclear C. Weak D. Electric Explanation: Strong force binds nucleons.