Question

1. What is the correct condensed structural formula for this Lewis structure? HT - II ΗΤΗ A) C5H10 B) CH3CHC(CH3)2 C) CH3(CH2)CH(CH3)2 D) CH3(CH2)2CH3 2. What is the correct condensed structural formula for this skeletal structure? A) CH3(CH2)5CH3 B) CH3(CH2)6CH3 C) CH3(CH2)7CH3 D) CH3(CH2)8CH3 3. What is the correct skeletal structure for hexane? A)

Answer 1

1) There is 5 carbon atoms and 10 H atoms, B and C options can correct as it doesn't contain same number of carbon and H atoms.

A is in molecular formula ,there is no information regarding the bonding and branching.

Correct answer is (B)

2)

There is nine carbon atoms and twenty H atoms.

In the expreme position,there is two methyl group and 7 CH2 repeating group in between that.

So condensed formula is

$CH_3(CH_2)_7CH_3$

Other options do not have same number of atoms as it is given in skeletal structure.

3)

Hexane means there is 6 carbon and 14 H atoms in it.

A,B ,C, D options have 4,5,6 and 7 number of carbon atoms.

So correct option is (C)