Isotopes of hydrogen include protium, deuterium, and tritium. Which one is radioactive? MCQ with Answer and Explanation

Explanation:
Radioactive decay emits alpha, beta, and gamma rays. Alpha particles are heavy and positively charged, stopped by paper. Beta particles are lighter, stopped by aluminum. Gamma rays are high-energy electromagnetic photons with no mass or charge, giving them the highest penetrating power; they require thick lead or concrete to be significantly attenuated.

Explanation:
Immiscible liquids (e.g., oil and water) form separate layers. A separating funnel is used to draw off the denser liquid from the bottom. Distillation methods are used for miscible liquids. Centrifugation separates solids from liquids or liquids of different densities in a mixture but not for two immiscible liquids efficiently in a lab; a separating funnel is simpler.

Explanation:
Acid rain results from SO₂ and NOₓ (oxides of nitrogen) dissolving in water vapor to form sulfuric and nitric acids. These are released from burning fossil fuels and industrial processes. Carbon dioxide forms weak carbonic acid (normal rain pH ~5.6), but SO₂ and NOₓ cause pH below 5.0.