1. Define catenation.
2. Which allotrope of carbon has hexagonal rings?
3. Draw the structure of (i) Butanal (ii) Isobutane.
4. Define functional groups.
5. State the significance bof homologous series.
Answers
Answer:
1. Catenation can be defined as the self-linking of atoms of an element to form chains and rings.
2. Graphite
The crystal structure of graphite amounts to a parallel stacking of layers of carbon atoms. Within each layer the carbon atoms lie in fused hexagonal rings that extend infinitely in two dimensions. The stacking pattern of the layers is ABABA…; that is, each layer separates two identically oriented layers.
4. A group of atoms responsible for the characteristic reactions of a particular compound.
5. Homologous series is the characteristic feature of carbon compounds in which carbon and hydrogen atoms in hydrocarbons varying by single parameter. Homologous series helps in determination of structure of the successive member of the series and the property of that members can also be predicted by their series.