Industrial ChemistryCross-Linked Polymers2881Choose the best answerWhich structural feature characterizes a cross-linked polymer?AOnly one repeating unitBLong chains with no connections between themCA three-dimensional network formed by links between polymer chainsDPolymer chains containing exactly two types of monomers Like 0 Discuss 0Share
ElectrochemistrySpontaneity of Electrochemical Reactions2882Choose the best answerWhich reaction is spontaneous under standard conditions?AZn + Cu²⁺ → Zn²⁺ + CuB2NaCl(l) → 2Na + Cl₂CZn²⁺ + Cu → Zn + Cu²⁺D2Fe(OH)₃ → 2Fe + 3O₂ + 3H₂ Like 0 Discuss 0Share
Chemistry of HydrocarbonsFriedel–Crafts Acylation2883Choose the best answerBenzene reacts with CH₃COCl in the presence of AlCl₃ to form:AC₆H₅ClBC₆H₅COClCC₆H₅CH₃DC₆H₅COCH₃ Like 1 Discuss 0Share
Chemical KineticsEffect of Concentration on Reaction Rate2884Choose the best answerWood burns faster in pure O₂ than in air because the concentration of oxygen in pure O₂ is approximately:A3 times greaterB4 times greaterC5 times greaterD7 times greater Like 0 Discuss 0Share
Industrial ChemistryChromophores2885Choose the best answerWhich structural feature is commonly associated with a chromophore?ASaturated single bonds onlyBA conjugated system of multiple bondsCOnly hydroxyl groupsDOnly amino groups Like 0 Discuss 0Share