“Reactivity Riddles: A Chem Crossword Challenge”

1234567
Across
  1. 3. A base-catalysed hydrolysis of esters yielding salts of fatty acids; the reaction is irreversible due to formation of ionic products.
  2. 4. A highly porous form of carbon with large surface area, commonly used in decolorisation due to its ability to adsorb colored impurities without chemical reaction.
  3. 5. Macromolecules formed via chain reactions (addition or condensation) whose properties depend on monomer arrangement, degree of polymerisation, and intermolecular forces.
  4. 6. A natural polymer of β-glucose units linked by β-1,4-glycosidic bonds, responsible for rigidity in plant cell walls and indigestible in humans.
  5. 7. A reaction in which the enthalpy change is nearly constant (~ −57 kJ/mol for strong acid–strong base), indicating formation of a stable product irrespective of reactant nature.
Down
  1. 1. A separation technique based on differences in vapour pressure and boiling points, often requiring fractionating columns when boiling points are close.
  2. 2. An analgesic whose reduced acidity compared to carboxylic acids is due to resonance stabilization of its phenolic group and presence of an amide linkage.
  3. 5. A logarithmic scale where a one-unit change represents a tenfold change in hydrogen ion concentration; used to compare acidity even in very dilute solutions.