A gas at 2 atm pressure occupies 5 L. What is its volume if pressure is increased to 5 atm at constant temperature? MCQ with Answer and Explanation

Explanation:
PVC is made by addition polymerization of vinyl chloride (CH₂=CHCl). Ethene gives polythene, styrene gives polystyrene, tetrafluoroethene gives Teflon.

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:
Compost is decomposed organic matter (plant waste, manure) and is an organic fertilizer. Urea, though organic compound, is considered a synthetic nitrogenous fertilizer when industrially produced. Organic fertilizers are derived from natural sources: manure, bone meal, compost. They improve soil structure. Ammonium nitrate, superphosphate are inorganic/synthetic. Urea is often categorized as synthetic organic.