Ozone layer depletion is maximum over: MCQ with Answer and Explanation

Explanation:
Rutherford's experiment led to the nuclear model of the atom, concluding that almost all the mass and positive charge are concentrated in a very small central nucleus, while electrons orbit around it. Option B is Thomson's model, A is Bohr's model, and D is de Broglie's concept.

Explanation:
Diammonium phosphate (DAP), with the formula (NH4)2HPO4, is a widely used complex fertilizer. It provides two essential macronutrients: nitrogen (from the ammonium ion) and phosphorus (from the phosphate ion). Urea and ammonium sulfate provide only nitrogen, while muriate of potash provides potassium.

Explanation:
Aluminium goes from 0 to +3 oxidation state (Al → Al³⁺ + 3e⁻), so it is oxidized. Iron goes from +3 to 0 (Fe³⁺ + 3e⁻ → Fe), reduced. This is a thermite reaction, highly exothermic, used for welding. Al is the reducing agent, Fe₂O₃ is the oxidizing agent. Oxidation is loss of electrons.