Which of the following is a natural polymer?

Define oxidising agents. Explain its role in the oxidation of alcohols to acids. Write the oxidation reaction of ethanol.

Which among the following are unsaturated hydrocarbons?
$(i)$ $H_3C-CH_2-CH_2-CH_3$
$(ii)$ $H_3C-C\equiv C-CH_3$
$(iii)$ $H_3C-CH(CH_3)-CH_3$
$(iv)$ $H_3C-C(CH_3)=CH_2$

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.

Unsaturated hydrocarbons produce a yellow flame with a large amount of black smoke when burnt in oxygen. Give the reason.

What is used to make vinegar?