Draw the structures for the following compounds:
$(i)$ Butanone
$(ii)$ Hexanal

Draw the possible isomers of the compound with molecular formula $C_3H_6O$ and also give their electron dot structures.

Write the name of the next homologue of $CH_{3}OH$ and $HCOOH$.

Which compound has the molecular formula $CH_{3}CHO$?

What is meant by homologous series of carbon compounds? Classify the following carbon compounds into two homologous series and name them.
$C_{3}H_{4}, C_{3}H_{6}, C_{4}H_{6}, C_{4}H_{8}, C_{5}H_{8}, C_{5}H_{10}$

Which of the following are correct structural isomers of butane $(C_4H_{10})$?
$(i)$ $n$-butane: $CH_3-CH_2-CH_2-CH_3$
(ii) Isobutane ($2$-methylpropane): $CH_3-CH(CH_3)-CH_3$
(iii) Cyclobutane: $A$ four-carbon ring structure $(C_4H_8)$
(iv) Ethane dimer: Not a valid isomer of butane.