Which of the following is used in conveyor belts?

Carbon exists in the atmosphere in the form of

What is the monomer unit of neoprene?

An element is a main constituent of paper,diamond and clothes etc. It forms covalent bonds with itself and other elements.
$(a)$ Identify the element.
$(b)$ Write the electron dot structure of its oxide.
$(c)$ Draw the electron dot structure of methane and ethane.

Which catalyst is used in the Fischer-Tropsch process to synthesize hydrocarbons or oxygenated compounds like propanone?

Explain how covalent bonds are formed. Mention physical properties of covalent compounds. Draw the electron dot structure of $CCl_{4}$.