Chemistry Fill in the blanks Set 29

Chemistry Fill in the blanks Set 29

1. Many synthetic drugs used are aromatic in part.
 
2. The coal tar forms the source of many organic compounds.
 
3. The modern theory of aromaticity was introduced by Huckel.
 
4. Ortho and para directing groups are called as activating groups.
 
5. Meta directing groups are called as deactivating groups.
 
6. Alkyl substituted benzenes are prepared by Friedel- Craft ̓s alkylation (or) Wurtz-fitting reaction.
 
7. Naphtha obtained by fractional distillation of petroleum is passed over platinum.
 
8. Aromatic compounds readily undergo electrophilic substitution reactions.
 
9. Fluorine reacts vigorously with aromatic hydrocarbons even in the absence of catalyst.
 
10. In the presence of platinum benzene reacts with hydrogen to give cyclohexane.