Which of the following is NOT a natural radioactive series? MCQ with Answer and Explanation

Explanation:
Ozone (O₃) is a more powerful oxidant than chlorine; it destroys bacteria, viruses, and organic contaminants, and then decomposes to oxygen, leaving no residual taste or toxic disinfection by-products. However, it does not provide lasting protection in distribution pipes, so a small chlorine dose may be added. Ozonation also removes color and odor.

Explanation:
In a Daniel cell, the anode (where oxidation occurs) is a zinc rod immersed in ZnSO₄ solution. The cathode is a copper rod in CuSO₄ solution. Zinc is more reactive, so it loses electrons (Zn → Zn²⁺ + 2e⁻) and acts as the negative terminal of the cell.

Explanation:
Hydrogenation is the addition of hydrogen to unsaturated compounds (like alkenes or alkynes) in the presence of a catalyst (like Ni, Pd, or Pt) to form saturated compounds (alkanes). For example, ethene + H₂ → ethane. This process is widely used in the food industry to solidify vegetable oils.