The compound with the molecular formula $C_3H_6O$ can show:

What is isomerism? Explain with a suitable example.

For the following four structures $I$ to $IV$,which statement is correct?
$(I)$ $C_2H_5-CH(CH_3)-C_3H_7$
$(II)$ $C_2H_5-CO-CH(CH_3)-C_2H_5$
$(III)$ $CH_3^+$ (Methyl carbocation)
$(IV)$ $C_2H_5-CH(CH_3)-C_2H_5$

Which type of isomerism is exhibited by acetic acid $(CH_3COOH)$ and methyl formate $(HCOOCH_3)$?

What are isomers called that have different structures and exist in equilibrium with each other?

Which of the following pairs of alkenes is an example of position isomers?