Methane reacts with chlorine in the presence of sunlight to give: MCQ with Answer and Explanation

Explanation:
Muriate of potash (MOP) is KCl, providing potassium. Urea is nitrogenous; DAP provides N and P; superphosphate provides phosphorus. Potassic fertilizers improve plant disease resistance.

Explanation:
Heating coal in the absence of air (destructive distillation) produces coke (solid residue, high carbon), coal tar (mixture of aromatic compounds), ammoniacal liquor, and coal gas (H₂, CH₄, CO). Coke is used in blast furnace. Coal tar is a source of aromatic chemicals and pitch. Coal gas was used for lighting historically.

Explanation:
Calorific value is the amount of heat energy released per unit mass or volume of a fuel completely burned. Common units: J/kg, kJ/kg, kcal/kg, Btu/lb. It indicates fuel quality. Hydrogen has ~142 MJ/kg.