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When a disubstituted benzene undergoes. Electrophilic Aromatic Substitution the location of the incoming group: is not affected by the existing substituents. will be determined by the most activating group will be determined by the most deactivating group only matters if the existing substituents are ortho/para to each other. only matters if the existing subsituents are meta to each other. Which of the following statements is true? In Electrophile Aromatic Substitution a hydrogen is replaced. In Nucleophilile Aromatic Substitution a hydrogen is replaced. In Electrophilic Aromatic Substitution a halogen is replaced. In Nucleophilile Aromatic Substitution a halogen is replaced. I & II I & IV II & III III & IV I,II,III & IV Which of the following statements about proton NMR is FALSE? the number of peaks indicates the total number of hydrogen atoms. the multiplicity (or splitting pattern) indicates the number of adjacent protons. the chemical shift indicates the local chemical environment (i.e. the presence of electronegative atoms and/or pi bonds). the area of the peak indicates the relatives number of each type of proton. the number of peaks indicates the number of chemically distinct protons. Which of the protons in the following molecule will appear as a singlet in a proton NMR spectrum. I II III IV I & IV II & III all of them
Explanation / Answer
6) c
7) b
8) a
9) e
