The $IUPAC$ name of $OHC-CH_2-CH_2-CH(CH_2-CHO)-CH_2-CHO$ is:

The $IUPAC$ name for the compound is

Structures and $IUPAC$ names of some hydrocarbons are given below. Explain why the names given in the parentheses are incorrect.
$(a)$ $CH_3-CH(CH_3)-CH_2-CH_2-CH(CH_3)-CH(CH_3)-CH_2-CH_3$
Name: $2,5,6-$Trimethyloctane [and not $3,4,7-$Trimethyloctane]
$(b)$ $CH_3-CH_2-CH(CH_2CH_3)-CH_2-CH(CH_3)-CH_2-CH_3$
Name: $3-$Ethyl$-5-$methylheptane [and not $5-$Ethyl$-3-$methylheptane]

Write $IUPAC$ names of the following compounds:
$(i)$ $[CH_3]_3 C CH_2 C(CH_3)_3$
$(ii)$ $[CH_3]_2 C(C_2 H_5)_2$
$(iii)$ tetra$-tert-$butylmethane

Provide the number of carbon atoms and their corresponding prefixes for naming alkanes.

Give the structural formula for the following compounds:
$(i)$ Butanone
$(ii)$ Ethanamide